
Spoiler!
well in the flashbacks, it's been seen that after he sucks them for food they're gonna be an aphrodisiac and one time I think it was shown that his mom(?) or that woman had sex with him and he didn't want it and was disgusted by it so I think he's a victim by his power and the people he sucks

Jean's constitution ended up making him get r4p3d more than once. They show one time where it happened with a woman, and Jean's father says "again?", which means this was a common occurrence. Mind you, he hadn't even gotten in High School yet.
On the other hand, Yuki (uke) is a virgin simply because he's dedicated to his studies and enrolled in a boarding school-- so not that many chances for him to lose his virginity with someone other than Jean. Jean himself would be a virgin too if he hadn't been r4p3d.
THIS IS SO UNDERRATED ITS SO GOOD THAT
I NEED THIS INJECTED IN MY VEINS..