lol where did i mention it had an effect on penis size? being the "genius" that i am i make it a point to actually read what others write before i make myself look like a retard as you have done here.
anyways, regardless of whether or not shrinkage occurs, sex is rather pointless with a flaccid penis, so your argument holds no merit as said shrinkage is no more worse than said flaccidity. not to mention the fact that these side effects of stimulants are gone by the next day as well, hence another meritless argument.