Long-believed theory why men must wait before having sex again proved to be fake in new study Updated: 7 Jan 2021, 14:06 NO matter how high their sex drives are, most men can’t go again for a second orgasm without a bit of a break. For years, this has been blamed on a hormone called prolactin, but scientists have just busted this long-held theory after a recent study on mice. 3 The long-believed theory on why men need to wait before having sex for a second time has just been debunked by scientistsCredit: Getty Images - Getty The new research is bad news for men, who thought the old research...