I masterbate once a day atleest. And was wondering if that could be the reason for me ejaculating sooner than I should when me an my gf have sex
Hi Commandant,
Yes it can.
You may have trained yourself to ejaculate quickly. That's what happens if you masturbate just to get off. You should use your masturbatory sessions to learn control.
Edging is a common method. Basically, as you masturbate focus on the feelings you have just before you ejaculate. The idea is to bring yourself to that point and STOP. Let the feeling subside and then bring yourself back to that point. Do it as often as you can. You should be able to do it for HOURS.
Eventually when you let yourself ejaculate you'll have more volume and it will feel better.
Good luck. Hope it helps.