Masturbation on amphetamines is fine, assuming one is in decent physical health so as not to strain the body too much, BUT the OP is experiencing trouble with not being able to limit himself with the masturbation in matters of both frequency and duration while using amphetamines, and thus feels he is not being productive. Frankly, masturbation, on amphetamines or not, is a personal thing - some males do it very frequently, others almost never, and of course a good deal in between. I am not saying masturbating on amphetamines is bad, inherently, nor do I think any of the other posters are (correct me if I am wrong), but they are simply expressing their opinions about not taking to masturbation while on amphetamines. And, to compound to this, the OP is having trouble with masturbation, and so a little discouragement from doing so while on amps is not a bad thing. Personally, I do not masturbate terribly frequently (usually 0 - 4 x monthly), and usually only if I have say the day before. Amphetamines do perk me up in all ways, and I have noticed libido in its most true sense ("life energy") has increased for me. YET, I am not personally drawn to masturbation all that much more than before I began using amphetamines, and when I do masturbate it is of similar length as it has always been, which is usually long, but for me that is not the effect of the amps - just a personal thing. I feel more on amphetamines - YES, but I do find it more rewarding, for ME, to do things other than masturbate. Like now, I am writing this post and giving advice and personal information to try to help here on BL, and reading through posts. I will often write amp'd, or read - if I have nothing to do. Or, if I have something to do, I use my amp'd energy just to do whatever that is, and just talking is a pleasure. But, like I have repeated in various ways, or at least tried to, it comes down to personal taste.