Because Liam's "resolution" for Caleb before Talks Machina made me laugh. (It was "RUHIG BITTE," which means "QUIET PLEASE.")
Caleb's not opposed to anyone in the party having sex, he just wishes they'd be a little quieter when they're getting it on. He can't sleep! He can't concentrate on copying new spells! Frankly, it's a nuisance.
But when he voices this point to the rest of the Mighty Nein, all it does is make some (or all!) of them decide to teach him the joys of loud sex.
Any/Any (within M9), Caleb/Any, loud sex
Caleb's not opposed to anyone in the party having sex, he just wishes they'd be a little quieter when they're getting it on. He can't sleep! He can't concentrate on copying new spells! Frankly, it's a nuisance.
But when he voices this point to the rest of the Mighty Nein, all it does is make some (or all!) of them decide to teach him the joys of loud sex.