Looks like wives have taken a book from LE (see link)

The classic "swallow" or "honey trap" has been more successful in espionage over the centuries than ANY other means. And it will remain just as successful in the foreseeable future. Although the eastern block did a lot better in recent times than the west it is the best bang-per-taxpayer-buck there is (pun intended). -Shiro.

...I guess it depends on what is 'proposed' by the honey trapper but flirting is part of being sexually alive whether one is monogamous in the marriage or not.  my 2 cents...my favorite was being our for dinner with a couple and I saw the husband scope out a beautiful woman at the bar.  Another woman at the table asked the wife if this bothered her...her response was great!  She stated that when he stops looking at beautiful women, then she will start to worry!