I totally agree and I ain't a feminist, for the record. I'm talking strictly on the level of safety. You saying it's not realistic, I'm legit curious to how? No offense, but it reminds me of that whole "putting on a condom is gonna kill the mood" rhetoric from back in the day.
And you're saying a lot of sex wouldn't go down...well, apparently a lot of it isn't consensual anyway so where is the problem?
A very simple "Are you ready?", "Can I ____?", "Do you like that, baby?" is all that is needed. And if they don't answer yes, then it's your call from there to read the non verbal cues. But if you can't read it or are at all skeptical, do the smart thing and stop.
Yes..."only yes means yes". "No" obviously doesn't mean anything, besides the worst case scenario of "welp, too bad because here we go
". I would venture to assume that most creeps/rapists don't care particularly about the no.