Is this just my imagination, or is masturbation actually a good workout for your arms?
Probably neither – unless your penis is several feet long, you stroke with both hands, and your technique requires as much effort as using a Bowflex or Nautilus, the "workout" from masturbation is negligible. What may be happening is your muscles may just be developing normally as part of the puberty process – this tends to happen even to guys who don't do strenuous workouts. (If you're in your 50s rather than your teens, though, this probably isn't the explanation!)
What do you think about when you masturbate or have sex? Would you tell your significant other if they asked?
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After masturbating for a while now, I've noticed that my triceps have gotten quite firm.
