evaluate holdens responses to sunny and attempt to explain why he may act the way he does during the course of their meeting

I think Holden is just really nervous. Loosing his virginity to a prostitute that night was harder than he thought it would be. Holden attempts to take control of the situation with pointless banter but only comes off nervous and scared. Eventually he fakes having had an operation to get out of the whole situation. Holden might have wanted sex beforehand but the reality of the situation made him feel scared and awkward.