I am a 43 year old guy who over the last year has experienced my penis kind of tucking inside itself. This does not hurt but is very annoying. I have gained about 20 pounds recently but am not a huge guy (5'5" - 165lb). I actually feel better that I have gained some weight since I have always been kind of small. I also have a history of testicular cancer, I have been in remision for 14 years. The remaining testicle seems kind of large, but does not hurt. I have had quite a bit of sexual dysfunction for the past 5 years or so. My wife has been very patient but we only have only had sex maybe twice in the past year. Are all of these things related and what should I do?