I have been told by many people that I shouldn't make a big deal of it and that it happens to most of men at a point or two but this has happened to me for the forth time now!
I have absolutely no problem getting an erection during foreplay. but once I put on the condom and start to penetrate, the erection dies and the condom comes off. Needless to mention that when this happens it doesnt come up again no matter I try because it puts me under alot of pressure. I don't wanna freak out but this has happened to me several times and I'm starting to worry.

I'm 26 years old, I'm very athletic and in a very good shape and I follow a healthy diet. Not taking any kind of drugs and I don't drink alcohol either. I'm not really used to using condoms though. and I was kind of addicted to masturbation for the past year but I've stopped for more than 2 months now. and again, I dont have a problem initiating an erection and sometimes I have wet dreams as well, so I guess its not lack of libido problem. but I'm not an expert so I wouldn't know for sure!
This issue is starting to affect my self image, your advice will be highly appreciated.