I don't think flirting, while married, is a great idea, but that's just MO.
And, I don't like the loud, giggly, obnoxious flirting. Truly, that's sort of gross.
I just like the quiet glances and smiles, and the deftly parried inside word or phrase, which, though there may be eight people standing around talking, only you and he "get it." That's flirting per me at 40. I like it much better than the Who Can Talk and Laugh Loudest and find More Reasons to Rub Up Against the Man type. Orangatans have more subtle mating rituals.
God. Another pro on "aging."
PS-- Chai, you are lying out of your ass.
I bet you exude flirtation, in a tasteful manner.