Fitty -- My Pillow Talk Ain't Worth 50 Cents

If 50 Cent makes you a promise post-coitus, don't hold him to it.

TMZ has learned 50 Cent is firing back at baby mama Shaniqua Tompkins, who filed a $50 million breach of contract suit. In a response to her suit we've obtained, 50 says anything he said to her is "nothing more than pillow talk and romantic declarations of love."

50 even lays out in the simplest terms -- "If I ever intended to make that kind of commitment to [Tompkins], I would have married her."