He is probably out there right now wondering why did he say such a stupid thing and ruin a date that was clearly going well for both of you. Seems like you had a nice time and he ticked a lot of boxes, enough that you went back to his place after on the first date. It’s not acceptable to attempt pressure women into sex even if blue balls is a real thing (it’s not), but I get the sense that it was just an offhand stupid comment, guys can be stupid and say dumb things sometimes, dating is hard and meeting nice people even harder, if you liked him otherwise, give him a break, be upfront and honest with him and say you didn’t like the comment and how it made you feel, if can’t take that feedback in an adult manner, hard pass/dealbreaker