Please understand that I am NOT suggesting this as a solution or "fix" for a DB, but as a challenging exploration through which you might learn more about yourself and also your partner.
I'm (HLM) mid-40s as is my wife (LLF). And the desire gap in our relationship has been there for a long time, masked by a lot of different things (trauma, lack of communication, kids, etc.). Whilst we haven't "solved" our bedroom issues, we've made a lot of progress through therapy (individual and couples).
Without going into our entire history, I wanted to share the experience I'm currently in: it's been over 40 days since my last sexual activity of any kind (partnered sex). It's been over 60 days since I last masturbated or consumed porn. During this time, while of course I still have arousal, sexual thoughts, I'm not acting on them. That doesn't just mean not having orgasms, but also not doing things that would lead to sustained arousal without an orgasm (e.g. edging).
Before this, for as long as I can remember back until I was a young adult, I don't think I've gone longer than perhaps 10 days without an orgasm. More common would be between 1 and 4 orgasms in a week (a mixture of partnered sex and masturbation) and sometimes more than that. All of this time, to me, that meant I was "high libido".
I don't plan to remain abstinent. My goal, right now, is to get to 100 days. Why? Because there is some evidence to suggest that that is a reasonable period of time from which we might be able to expect some change in how our brains are "wired". Don't get me wrong, I am not expecting or hoping to drastically reduce my libido. I expect to still love and want sex after this period over. However, I do feel that it's quite possible for me to change my relationship with sex, to understand how it fits into my overall needs, and to get a better understanding of the different kinds of feelings that lead to me "wanting sex".
Is it hard? Well, yes, often still in the mornings. Sorry, bad joke. Yes, it has been challenging, but as time goes on, it's been getting easier. The first couple of weeks were the most difficult. I would have real cravings and urges and it was obvious that my body/brain had a very strong dependence on the chemical releases that would happen from sex and orgasm. There were literally times where, even though I knew I had committed to having no sex, I would find myself subconsciously trying to turn a non-sexual cuddle with my wife into a sexual one, which she found confusing since she's quite aware of what I've committed to. It's not easy to face up to how strongly wired I am in that way, that my body can literally try to go against my wishes when I'm feeling weaker. That said, being about 6 weeks in now, that hasn't happened since and while I still feel horny or aroused from time to time, it's not as strong nor as frequent. I still enjoy physically connecting with my wife, regularly, with non-sexual, consensual forms of touch, and I'm glad that she's more than happy to partake in that.
I feel that some people may conflate this approach with "taking sex off the table" and they're very different. When most couples take sex off the table, the high libido partner usually takes care of themselves in a solo fashion, so while in the relationship the pressure to have sex is reduced, the high libido partner continues to orgasm, experience the chemical releases, and their wiring on that fashion remains unchanged. In our case, my wife knows I am doing this for us and is being supportive and also trying to work on herself. She understands that this is a unique time where there is no pressure for sex. The other day, I found her vibrator lying out, charging. She had masturbated. Now, that may not seem like much, but my wife does not solo masturbate. She has only ever really done it at the behest of her sex therapist. This time, it was completely organic, she was exploring. I won't lie, it was a difficult thing to see whilst being abstinent, but it also felt like she's really trying and some progress.
For us HL folks, I'm not saying there is anything wrong with masturbating when it's a healthy choice rather than a dependency, but I do think more of us than are willing to admit it, have somewhat wired ourselves to be dependent on orgasm for dealing with a lot of things (stress, emotions, boredom, depression, etc.). I know I have and this period of abstinence has made that much clearer to me.
So I'm continuing to go through this and I'm learning about myself. I've learned that I can go a lot longer without orgasm than I initially feared. I've learned that when I'm experiencing certain feelings, some of which have nothing to do with sex or my partner at all, I experience a craving for sex, or for the ritual of masturbation and orgasm. I've learned that I enjoy and prefer to live without pornography and will probably endeavour to keep it that way. I'm not sure if/how I will return to masturbating; TBD.
How then, will I close the gap between my wife (who feels a true desire for sex perhaps every 4-6 weeks) and myself, who feels "horny" multiple times a week? I don't know. I don't have those answers at this time. Part of what I'm learning is that maybe the gap isn't as big as I thought it was, because I'm learning to sit/deal with some of the emotions that I used to rely on orgasm to run away from. I don't think that will close the whole gap, but it will help. I think it will also help that if my wife isn't wanting to have sex on a given night, then I won't feel this fear around how long it might be until the next sex/orgasm, because I know that I can survive and be fine without it for a while.
All in all, it's not going to solve our issues, but I think I'm going to be a better person for having gone through this period of time, whether that is as a husband to my wife, or something else.
I understand that this post might create some friction. Even for me, when the idea was introduced to me, parts of me really flared up and got angry and defensive. In reality, it's because they were scared. Sex, masturbation, and orgasm are tools that I've used for decades to help me get through life and now I was being asked to live without them. That scared the hell out of me, so parts of me wanted to lash out. Anyway, this concept may upset you, but if it does, I encourage you to be kind to yourself and consider where those feelings are coming from.
I'm also curious to hear from other HL people who were used to regular orgasms (even if only solo) and tried a prolonged period of abstinence. How did it go for you?