Every time I have sex with my girlfriend my penis never reaches its fullest erection. She is my first sexual partner and I find her amazingly attractive. The only time I ever do reach the highest point is when I masturbate (New Picture shows me at 100%). My theory is that because I use a condom the feeling decrease consequently causing me to lose some of my erection. When I am not wearing a condom and she is giving me oral it seems to be great, but once we move on to intercourse I put on a condom and little by little it begins to decrease until it reaches semi-hard. Is there anyway I can maintain an erection for a longer period of time while using condoms. Will doing physical exercise increase my erection? And finally, should I resort to pills to increase blood flow?