My girlfriend and I have recently become sexually active.
My parents had left my house, and when she started to strip I lost my erection.
I tried masturbate a little to restimulate but it didn't work.
In my head I was a little worried if she would think my penis was small, or if I would finish to early?
Could someone please tell me how to fix this problem, and make sure it doesn't happen next time?
Nervousness or worries could cause some people to unconsciously lose excitement. Without realising, some people can be very scared if they have never or have just started to have sex. This shouldn't be something to worry about at all and it should get a lot easier.. but why not ask a doctor or someone experienced in talking about it that you feel comfortable with about it and see what they have to say?? They get lots of questions like this everyday and will be happy to help :)