Hello , I am 45 old newly married guy. Last 1 week I have sex with my wife it was 5th time for me. At bed room, first she removed her clothes, she became nude and later I have also removed my all clothes. After seeing her, my penis was not standing properly. It stood up for some moment and I pushed my penis (Have used condom) into her vagina but only my penis tip went inside to her vagina and it went down. After some time, I tried to bring it up by masturbate and till that time, the sperm came from my penis and again it doesn t standup down. So we didn t have sex. At last my sex was 100% flop. I don t understand. still why penis is not standing up? I also havy masturbate previously . May be masturbate was reason for that...? but still I don t know what is proper cause for it I am much worried about it..