I'm finding lately, after a bit of hindsight, many of the women that I meet that are dating, married, or otherwise tend to overtly flirt harder than single ladies.

If it's a Friends SO it doesn't happen really, but if it's a new acquaintance and I meet a couple, weird situations arise where the lady seems to overtly get into conversations, body language, kino, and comfort levels that honestly make me feel pretty awkward when I never hit on a taken person out of respect for both parties.