I always look a woman straight in the eye when I'm talking to her. It's a game of chicken as far as I'm concerned. I won't give her the satisfaction of letting her catch me looking at her tits.
I'll up the ante on OP's premise. I'm in a long-term relationship. Have been for longer than I care to remember. Whenever I'm out in public with my girlfriend (wife, whatever), she's constantly keeping an eye on me, trying to catch me checking out other women. She makes it easy to check out other women, and not let either one of them catch me doing it, because I just keep my eye on her keeping her eye on me. Whenever she gives me a hard look I know there's some hot cleavage on the radar. She can't just stare at me the whole time, so when she's satisfied that I didn't see the other woman, that's when I quickly scan the area and check out the tits. Women have strong powers of perception, but just because they perceive something doesn't mean they can prove it!
