Gotta get a broad that likes women as much as you do, or loves you enough to allow a woman into the bedroom. Easy
BUT
I do get the premise of the thread, while I wouldn't relegate it to 'cheating' only, I have noticed that those who haven't been through ups and downs as far as their own personal choices tend to have a black and white view of people/situations/environments and a severe lack of understanding. Because it's highly doubtful that they've never done something that would be considered extremely wrong, but moreso that they've successfully convinced themselves that it didn't happen like 'that', or they didn't do anything wrong, or they've blocked it out entirely.
Basically, it's more likely that a person who presents as a perfectly morally upright person has succeeded in lying to themselves and therefore is more dangerous than the flawed person who holds themselves accountable for their missteps.