if you TFK too many times in ONE day.. you get temperorary ED.. which is reversible by 'pausing' for a while..

if you TFK multiple times everyday.. i think you may have low sperm count coz the testicles malfunction..

and if you watch The Island, some dude needed a kidney or liver transplant because he has been having lots and lots and lots of sex.. so.. mayb there might be some truth there?