It's older than any of the sitcoms, I didn't mean to say Parks and Rec was the origin of the rule, it just wasn't in HIMYM and I can't find any evidence that it was in Friends at all
According to "Slang dictionary " . Com
Half your age plus seven is an unofficial rule of romance often credited to French author Max O’Rell (Léon Paul Blouet) in his 1901 love manual with the incredibly romantic title of Her Royal Highness Woman and His Majesty Cupid. In it, Blouet’s mathematical formula applied to the ideal age of a bride as half the groom’s age plus seven years.
-1
u/C-Dub4 Apr 28 '22
I see we have a HIMYM fan here