what's the difference if instead of a hooker, it's his ex-GF? What's the difference? He paid the hooker directly for sex as opposed to he pay the gf indirectly (dates, flower, meals, gifts) for sex?

What about, you? What if you told him you had sex with your ex-BF? What will he think?

Sex is part of human that need to be satisfied. Nothing wrong wanting it. Having said that, no...I never being with hooker.