But the most important thing to remember is that this study can't tell us whether pre-cum can cause a. Sexual activity is not necessary to initiate the secretion of the fluid, but it will continue during the sexual activity. I really want 2 know how guys can sit there and get head for like 10 minutes later, but there are times when I try to. We are just friends by the way, but we are open about. I understand it can be difficult to tell a man faster?