Hello Mr. Andrew welcome to HCM 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.