I'm 18 and so is she, I can't last more than 5 minutes until I need to take a break, but I'm always on top and always thrusting. I ask her to ride and she just looks at me like she wants to stay on her back and doesn't want to ride bc she doesn't know how to really, she tries and my penis just pops out and asks me to go back on her back... Bit frustrating. But how can I train my self to last longer?