Depends what intentions you are stating and at what point. If you got a girl at your house, "Come over here, I'm gonna play with you" is perfectly fine. If she doesn't do it, you probably have no chemistry together. Now if you are saying that in the club, most girls won't be into it, but heck, if you are confident just keep trying, you will more than likely strike gold eventually... even if it's just revenge sex or something. If you're not into a long term relationship, etc, say that. Lying about your intentions is a good way to bring a lot of drama into your life. Also a piss poor way of getting them to understand and meet your expectations.
I don't do all this 3 dimensional chess, making her think I want a LTR while secretly plotting to get in her pants. It requires a massive effort, usually a lot of stress, acting out of character, and results from her are usually poor... i.e. bad in bed, no sexual energy, buyers remorse, self esteem issues, angry exes/family members/orbiters at your door... just all sorts of things that make it a questionable effort.
An extreme example, say a guy is only able to be aroused and fulfilled through the woman puking on him or something, wouldn't he want to make this known at some point? And at what stage in the relationship should he make this known? I would say almost right away. Why put in the effort for a woman who probably can't give you what you want, and might blacklist you as soon as you bring it up, regardless how long you dated?