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Massage doesn’t just make muscles feel better, it makes them heal faster and stronger
(seas.harvard.edu)
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Does it help with ED? Asking for a friend.
Har. Probably not.
If this 'friend' is having ED issues the first stop is to your GP to get 'their' heart checked out.
also, your penis isn't a muscle. lol
ED is often a early warning sign of poor metabolic health. Fixing your metabolism will probably fix the ED. Lots of ways to do it, but keto appears to be the most powerful.