Whenever I hear dirty talk in the appropriate context, it makes sense and it helps in the arousal process.
It does what it’s supposed to do and it does so effectively.
But, it doesn’t work for me.
From my experience, I find it to be hilarious. In fact, when I hear it, I begin to giggle and the giggle turns into a laugh. And, no one wants to laugh in these kinds of situations.There could be several reasons for the hilarity:
1. The things being said are ridiculous.
2. The things being don't feel genuine.
3. The things being said sound like porn parody.
4. Their mouth should be busy doing something else.
I'm sure there are other things that are no-nos, but I can't think of them now because I'm too busy laughing.