Some men flirt because it makes them feel good about themselves when they are otherwise fairly insecure. In other words, he may be trying to get a positive or equal reaction from the other woman to endorse that he is desirable.

Is it OK to flirt in front of your partner?

For some couples, its completely fine with both partners if one or the other of them flirts with other people, even if they do so in front of each other, as long as it doesnt go any further. And for still other couples, flirting with someone else is a serious no-no.