It's worse than that. For various reasons, some men are actively more interested if you reject them. It is a little bit like the principle that running from a bear will incite its chase instinct.
Obviously if she says no and leans away, you stop and don't try it.
But I still hear LOTS of people say this and it's exactly what I'm talking about. Everyone keeps saying men need to be aggressive and I really do think that's what causes a lot of the sexual harassment.
I'm pretty picky about consent. There are men who know how to delicately signal their interest and invite me to signal back whether or not I am amenable. I have the general impression that such tactics get men a lot more action than tactics that intentionally step on a woman's boundaries as a matter of course.
But there are also many women, in my experience, that for whatever reason, don't or can't signal their interest or intentions. In that case I ASK them. It sounds very awkward to say it, but if done in private (i.e. you don't shout it out) I've actually noticed it creates a lot of comfort in the women. e.g. once I asked a girl I was on a date with, and she said she wasn't comfortable with PDA (we were inside a bar). I didn't push it, but after we left the bar and nobody was in sight outside, we did make out. I like to think if I had just "gone for it" in the bar, she would have been uncomfortable, I would feel rejected, and generally bad things all around...