like dirty emails?

Ok so I'm going back and forth with this guy that I (as well as him) am using for sex. We both send eachother fun, dirty emails back and forth and he usually gets back to me very quickly.

It's been over 1 day and a half since he sent one back! Is he testing me? There are times that I didn't get back to him for that long, is he just trying to throw it back at me? The last email was pretty darn dirty that I sent but I thought guys like that coming from attractive women!