This discussion boils down to if consent must be continually given or if you can give it ahead of time. And I'm not up to date, but I believe it's not a settled discussion even in academia. The problem of continual consent is that if it must be continually given then you can never give your partner permission to initiate sex with you before you wake up, or agree that it's fine to have sex while drunk, and these are things a nontrivial amount of couples want and are not harmed by, which means such a rule is inadequate.