What I find funny is women who are visibly married (rings) claim to be so uber desirable that they still get hit on. What they don't know is there are men who see them as a great fwb option. Some other dude be paying the bills and single dude getting to play.
What I understand is that if a person wants only a sexual relationship than say so. There are ways which are far more polite than let's bang or wanna hook up. Simply state you aren't interested in a commitment but that you are open to nsa fun.