I don't think it's reasonable to expect men to be both mindreaders and carry around alcohol (or drug) testing kits. In some cases it may be that the man is sober and the woman very obviously drunk. Fine, call that a man taking advantage of her, rape. But drunk people don't always act like like a bad actor being 'drunk' all slurring their words. Many times they are just a bit more playful, or yes, uninhibited. If they have both been drinking, he may have noticed how much she has had, but does he know her limit? Maybe one shandy and she's 'not responsible.' If they have just met, how does he know how much she has already drunk, or what her 'sober' character is like? And if she then gives him the signals, or invites him back to her place and is the one initiating sex all the way, she was raped? If the man has no idea she is 'drunk'? It seems then that men should only sleep with women that have had absolutely no alcohol, and that they have seen that to be the case. If we accept there is rape in marriage, then a married couple cannot get drunk together and then do it, because the woman is incapable of consent? Everytime that has happened, the man was a rapist? I don't think many men or women will go along with that.
As for being a mindreader, if a woman - or man - is with someone who is escalating to sex, he must wait to be told, in actual words, 'Yes I do want to have sex with you'? Most women do not want to have sex that way. We will say 'no' if we don't want to. How hard is that? As for HerBex's supposed situation where a woman is a so frozen with fear she cannot speak, aside from the 'attacked in a dark alley' scenario, or if the man says 'haha, I'm going to rape you now,' why the fear? Why would the woman NOT think the man would stop if she said no? Even realistically she should be encouraged to say it because a jury is not going to convict him if all he did was proceed when she didn't say yes or no.