So I found out that when my girlfriend gets really wet. So wet that there is a lack of friction for the both of us and it feels like I can go on forever, or until I get bored. Anyone else have this problem? I should add, when we jump into a quickie, it seems I only last for about 5 - 15 mins. I'm trying to figure out a way to have friction for her and enough for me to go as long as she'd like me to. Any advice?