So my boyfriend and I are having a lot of sex. Like we went for 4 rounds yesterday. But for some reason I have never been able to finish. Like not with any guy. He's determined to make me orgasm but I don't know what it feels like or how to simulate it?? I've always faked them before and nobody's ever questioned it but he knows when a girl comes and I haven't. I want to make him feel good but I don't know how?? Please help??