I would like to know if any other guy has experienced an internal orgasm. I only have these when I am anally receptive. The weird thing about them are that during sex I am hard up to a point then I go limp. About the time that happens I start getting this tingling in my stomach that is the same as that feeling a guy gets in the pit of his stomach just before he orgasms except this is long and drawn out and I don't ejaculate. The most that happens is after the feeling subsides a little I'll secrete a huge glob of precum. Usually, depending on how long my partner lasts, I can experience these waves about two more times within a 30 minute timespan. After sex I am just as exhausted as if I'd done all the work and I have no desire to masturbate afterwards.
Do other guys experience this?