Hi, I am a 20 year old male. When having sex I can t ejaculate, at first it was great because my girlfriend loved it, but now it s frustrating. I have a bend in my penis and when masturbating I have to apply pressure to the area below my testicles as it seems to push more blood to the penis and stimulate me more, i also have to move my hand very quick, I could go this fast during intercourse. I ve tried going to a doctor to see if it was erectile dysfunction however she didn t know what it was. I have also tried viagra and this didn t solve the problem, can you lose desenstivity in the penis by masturbating too much, or should i be worried about the bend in my penis?