no doubt.anytime i start a dbol run after being off for a while the 1st week or two my boners are non-stop.my girl likes it at 1st but after a while it gets too much she says,lol.by the 3rd-4th week it's back to normal.there when i need it,except when on deca...damn deca dick...just made me want to use mine all day, no sensitivity change. but my hardons wer some serious throbbers.