2.Thinking or "nerding" about it to an extent that you are removing yourself from interacting in the social context you are in.
While talking about how to approach a girl, one of the guys mentions that women nowadays are super-independent and that it's to be respected.
Henry starts intranerding by getting stuck on this in his head; thinking about the development of independency relating to post-modern culture, ancient philosophy and the needs of humans according to Maslow's hierarchy. The issue becomes so complex to him he's unable to talk to any females all night and will, if approached in any way by a woman freeze with fear of simplifying his response to disrespecting the woman. Poor Henry.