Using the definition, would you have sex with someone other than your spouse/so without them knowing and approving of what you're doing ... the answer is: No I haven't, no I"m not, and, no I wouldn't.

Like OF, I like to flirt and appreciate seeing a very pretty lady like our Pixie gals ... but I don't think of that as cheating any more than my wife saying something like Tom Selleck is a handsome bloke.