Hi Doctor... I ve tried having sex with a woman twice now... While we are making out and doing foreplay, I get an erection fine, and everything feels alright. But after 5-10 minutes, I notice I get pre cum, and soon my erection starts to get soft. It s happened both times now, and it s embarrassing. I used to masturbate frequently as a teenager and a little into my early 20s, but I ve been better about masturbating less frequently. Is this happening to me because I used to masturbate too much? Are my parasympathetic nerves out of whack, or my seminal valve because of too much masturbation before? Is there a way I can stop pre cum from occurring too soon and ruining my erection? Age: 22, Male