Is it because we have an entire generation whose conception of sex and sexuality have been solely informed by badly translated Japanese hentai?
Whenever I hear "lewd" I imagine crusty old ladies at a parish bridge club voicing their disapproval of poodle skirts or something
Because old-timey words are funny
Same with Yiddish
Oy gevalt!
Tuchus!
Verklempt!
Heh heh, tuchus
Find me a person who doesn't find tuchus funny and I'll show you a person who lacks a soul
Big fan of calling someone a putz
My grandpappy called jeans "britches" (or bridges)