When the game talks about sex like this, it typically means vaginal/anal sex, but the definition is sketchy at best. I take it you only engaged in oral with Erato?Belle Really... View attachment 3052459
It turns out truthsayer is a SCAMMER but you have no way to refute it...
What happens behind the scenes is that each girl you have vaginal/anal sex with gets tagged in the game's variables. This dialogue tallies the number of girls who have been tagged.