Guys: What would your reaction be if a good male friend you thought was straight told you he was bi?

I am apparently a straight guy. I don't identify as a gay guy. I've never felt "in love" w/a guy, but have had several long-term relationships w/women. I have had w/a few guys and love it. I had a very good friend that I thought might feel similarly but kept it under wraps. While under the influence we messed around a little...mostly j/o watching . Since then I have moved away and the relationship has chilled considerably. How do you guys feel about this? Would you have oral w/a male friend who you liked, trusted and was discreet?