Quite an embarrassing problemWatch
Speaking of which, you could get a Fleshlight. The physical sensation is very much like being inside a vagina.
I'm a 20 year old guy and still a virgin. I have been trying to get into a relationship but keep getting rejected. However there is one thing that makes me nervous about having sex. When I masturbate, most of the time I finish quite quickly and I don't want this to happen during sex. Most of the time I am masturbating quite quickly and I guess this could be why. I can last longer if I slow down but I normally get bored and speed back up again. Is there any way to help me last longer so that when I do have sex I don;t finish quickly?
I imagine you will be just fine when it comes to the real deal. You can always give your partner some more targeted pleasure to buy you time and make her (assuming it is a her) enjoy it more.