I'm 18 and have been with my girlfriend for around 6 months now, so i'm obviously someone of little experience. A few months back (possibly feb or march) we had sex for the first time, felt great, seemed to last a decent length (20 odd mins maybe?) it all seemed perfect, we both enjoyed it. Since then i started masturbating on my own a lot more and after that we have had sex maybe 3 or 4 times more. These later times though I have found myself ejaculating way earlier than i would like to and sex has lasted way shorter than the first time I did it. Obviously i'm not enjoying it ending so quickly and neither is she. Is it possible that the cause of my premature ejaculation (if thats wat it deffinitely is) is that i masturbate too much or a lot? I really want to go back to how it was when we did it for the first time, which felt great...
Also on a side note, my girlfriend told me that in none of the times we have had sex has she ever orgasmed...is that a problem with her or with me? Obviously it does take longer for a girl to orgasm than a man to ejac, but say i ejac after 2.5 mins, she most likely hasnt orgasmed...any help?