For some time now I have been masturbating and at the point of orgasm I press down firmly on to the perineum. This prevents ejaculation a but prduces a reall deep and prolonged orgasm. My question is whether other guys have tried this and whether it is a dangerous practice. Have heared that the sperm produced can get in to the bladder but dont see that this would be a problemas it would eventuall be discharge with the urine.