<s>[INST] Respected Dr. Andrew, I have never faced any problem in sexual related. But from last 3,4 months am feeling that my penis as not as tight as it was. In last 6 months I have started a lot of smoking and also I masturbate not by hand but by laying downside with movement. I am also a good doing guy height is 6feet and weight 76. Please suggest any medicine or anything please. [/INST] Hello Mr.  Andrew Chronic regular smoking leads to Erectile Dysfunction.  Avoid smoking and try to do regular exercise.  Check for blood glucose level, Cholesterol level, Serum Testosterone  (preferable sample is early morning fasting blood ),  During your masturbation rubbing against the floor did you felt any "Pop"sound and followed by immediate loss of erection and swelling of penis if you felt meet an Urologist as early as possible. If you are a known Diabetic or Hypertension patient try to Bring it under control. PIPE test is a diagnostic investigation. If u do not have any comorbid illnesses - Relaxed Stress free mind is ur best Medicine Hope you got your Answers. </s>