
It’s was a one night stand, but it also was when Turner lost his virginity. This is revealed at the end of volume 2 chapter 7. Then Benny being jealous throughout chapter 8 (threatening the devil with a gun full of holy water lol), and on pages 28-30 it’s when Turner tells him they did have sex but they didn’t kiss.

Oh, lol. Well the devil did say “I was John” and Benny says at some point “I can’t believe you slept with him” plus the flash back where “John” asks him all this religious stuff and Turner thinks at that moment John was making fun of him, but now it makes sense, and finally the devil saying “the soul of the owner resides in the body while I use it”, which it means, at least to me, that he was indeed using John’s body when he slept with Turner.
I just reread and I'm confused on something so the devil is residing in the body of a man called John who took ml virginity but was devil in John back then