Sometimes(not always) I can't get hard with a girl I don't know very well, even though I want to fuck her. Once I've been with a girl enough times to be really comfortable with her then I'm golden. It's not that I get nervous, it's just kind of a mental block. This can be really frustrating when I want to have casual sex.

Alcohol of course helps me feel more comfortable with a new person but then I'm susceptible to liquor dick. Anyone else have or had this issue??