Should a Guy have Girl Best friends when he Currently is in a relationship?

The implication here is she was not his best friend prior.

If your wife is not your best friend, what exactly is this new woman serving, psychologically?

Naturally, lust will form unless each is particularly u desirable to the other.

If you found out your sister or daughter was having a man get close to her suddenly, it would get concerning right? This would still be concerning even if he was close to her age. We know what he maybe wants. We know what she maybe wants.

When he finally gets her pregnant will you want bigamy? Polygamy?