Yep, totally looked like he was lying at the time.
Same as it looked like he was lying when you find him in the library when looking for the DIK laptop because of the Cathy Cluck.
He's either a shifty
looking character, or he's actually a shifty character.
Not sure why he'd lie about Arieth though. Either he's trying to sound like "just one of the boys", or he's trying to cover for something.
Maybe he's a virgin and he's embarrassed so he lies about it, who would suspect that he
didn't sleep with Arieth.
I thought perhaps closeted as well, but I feel I've used up my "he's gay" quota, so I refrained from that assumption this time. "Virgin" seems more shocking, particularly in this game!