There are different kinds of male friends:
1. If he is half of a couple (ok)
2. If he was your husband's friend first(ok)
For all practical purposes, you are off limits to him while you are married.
I you are a woman and you have any kind of male friend, and you became single all of a sudden, any man in his right mind would want to make you feel better in any way he could. Therefore, "If you're a woman and you think you have a male "friend" I'd say there's a 99% chance he he is sexually attracted to you and he thinks he has a chance with you." You bet!!!!!!
Even if he's happily married, if he sees you are in pain, he will try to do what he can to make you feel better. And that's when it gets dangerous.
Isn't that funny, that even if someone tells us the truth and we don't want to hear it, we deny it? Ladies, we control this situation, so it's not a problem for us. Just make sure you don't let your man console a woman "friend" without your supervision!