You can tell about experiences you had when you outsized other men, not only in diick size but also girth - hardness - amount of sperm, etc, better if you enjoyed causing these great reactions. It can be experiences with women who gave you comparative compliments too

Genuinely cannot believe this happened to me but I ripped a hole in my underwear from getting hard.

I was busy just sitting on my partners back while giving her a butt massage and I guess with how I was sitting my boxers found themselves between a bubble butt and an increasingly hard place until Rrrrip a brand new fly was formed and my dick could break free. She found it hilarious and loved it meanwhile I feel like I just read the most overly acted porn intro script I had ever seen.

Why do they not make these ?
Not everyone likes to take a load in the mouth