my boyfriend has recently started taking a creatine supplement along wih a protine suppliment to aid weight gain, he excercises daily and eats a very healthy balanced diet. ever since he has started taking these suppliments a problem has arrose, whille we are having sex his penis has started to soften and he looses his erection sometimes we can bring it back fast but not all the time. in general he does normally take a long time to ejaculate even before starting these suppliments but we havent had the problem of a lost erection mid sex before...please help to shed some light