When I was much younger, I did that once.  I didn't do it to get layed but rather to keep the person interested because I wanted to know him better.  I learned really fast that it doesn't work...so, ya live and learn.  I'll never do that again.  In my case, I found that I was always compromising myself for what the other person wanted and I was unhappy.  Now, there is no compromising with who I really am as a person.  Honesty all the way!!!