I'm married but have an online dating profile. It's fun.
I take it you're unhappily married, then. What are you looking for?
I want to have sex without any commitments
Why not get a divorce before you start cheating? You clearly don't want to be married, or at least monogamous. Just be honest and end it.
Nah, I have complex issues.
Whether you have issues or not, you shouldn't cheat on your wife. Be honest and tell her you're unhappy.