I remember that too - definitely with non-verbal cues but also several verbal ones as well. Something like 39% of college guys in a large study admitted to researchers that they'd pressured women into sexual things they didn't want to do. Some of that was verbal coercion or cajoling and some of it was a lot more physical and just not taking No for an answer. And that's just the number who admitted it to researchers. Most of them didn't think they were doing anything wrong. It's just what men do and "how the game is played." So, the masculine culture of "getting some" and women as prey is part of the problem as well.

At some point I want to write something about how the idea of consent the way it is constructed actually allows men to push past waffling consent and then claim it was all agreed upon. Enthusiastic, on-going participation should be the metric, not "I got her to say Oh, Ok, but she didn't really want to."