In my limited experience with the opposite gender I've found that it takes very little to get me really hard. I'm talking 30 seconds of semi-intense making out and I'm going to be at full erection. My last girlfriend was cool with it, but something tells me she is in the minority for that. Not knowing about any given girl's reaction to my quick starting nature has really dissuaded me from making out or grinding with girls at parties because I don't want to risk the utter embarrassment that could come from being called out in a college party. So girls, try to put yourself in that situation: I'm someone you're in the process of getting to know, we start kissing or whatever, and you notice that I'm at full attention way too soon. What would be your reaction?