hello
i am a 20 year old male who has had problems for as long as i can remember. i am very sexually active with my girlfriend and have been for about 6 years. i have been with a few diffrent women but have been checked for stds and dont/have never had one. in the past few years i have noticed that when i have sex/masturbate that sometime my right testicle gets very sensitive and i get a slight burning sensation in the tip of my penis. also sometime when i am masturbating i find that i get a strange sensation and it sounds like air bubble are inside/coming out of my penis. this has caused me a great deal of discomfort but i have never been able to find a solution to it. i have been to the doctor about it and he thought that it was an infection but test turned up negative. he also thought it could be something celled vericolli or something like that but again it wasnt. so if anyone might know what this problem could be or has any recommendations please let me know your help will be greatly appreciated. (please dont mind my grammer or spelling it is hard for me to see my keyboard in the dark)