I don't think the entire festival is about sex.

[ Look, she hasn't exactly researched the lore extensively – and she probably won't, to be honest. Mikasa's flustered look is quite a contrast compared to how she was presenting herself just a few seconds ago, and Velvet holds back a grin. ]

It's not the type of cultural attitude I'm used to, either. Discipline and sacrifice were a lot more popular where I came from.