My husband is attracted to other women....whooptido. Your husband is attracted to other women AND men...whooptido.
He only told you this, so you'd feel closer to him, and he'd feel closer to you, because you share a secret about him. My husband told me he's attracted to women with big boobs. That doesn't mean that either of our husbands are going to cheat on us...it just means they like to look at and get turned on by people other than us.
I don't like it when he acts on it too much (aka porn) but I am attracted to *gasp* men besides my husband.
What are you really worried about? Is it the fact that you had an idea that your man was masculine, and now that you know he likes men, he seems less...manly?
Look on the bright side...now when you're out in public with him, you can both check out the guys
I'm not making light of this, because I would be upset to find out my husband was bi too. Logically, however, it's not a big deal...in today's world