I'd never approach a woman with the lines you ladies are talking about. They seem very arrogant. But that's just me. Sort of a Don Quixote type trying to protect women's virtue.I cringe when I read that men expect sex the 1st date or by date 3 or they assume women just aren't into them and move on.
Regarding men expecting sex the first date, my entire intentionally short lived socializing with women was a surprise hookup dropped on me by a woman, a surprise and blind hookup dropped on me by a woman, a blind hookup arranged by the woman. At that point I found a woman who respected my space.