I love dirty talk. It is a super aphrodisiac for me. When a man whispers nasty things in my ear I get all hot and bothered. He can take me from a standing start to full speed in nothing flat, leaving a streak of metaphorical rubber smoking on the metaphorical pavement.
I think a man likes to know he can do that to a woman with just his words. It gives him power over her. When I tell a man how this works for me I give him that power. He likes that, and so do I. He gains the ability to affect my arousal and I gain the pleasure of that arousal. He can push me fast along the path to an orgasm or push me right over the edge when I get stuck on that path.
For example, a partner once did it to me when he was fucking me and I couldn't quite get there. He saw my problem and grinned at me. Then he whispered in my ear, "Look, you filthy cunt. If you don't come right now I'm going to quit trying and pull out. I'll jerk myself off while sitting on your belly and shoot my jism right into your face. You'll be drenched in my smelly, gooey cum. And then I will wash it off by pissing on your face."
I was well into a crashing orgasm before he got to the pissing part, and that moved me along to a nice second, smaller one.