On "Manning" Up

I had to "man" up at one point last evening.

Now, I will admit to being a complete douchebag, especially when it comes to women.  I am often crass, rude, and indifferent.  However, there are limits to what constitutes douchebaggery. 

Now, I was outside talking to a couple of friends, including someone who I used to work with, while my housemate was inside and talking to a guy.  When we came back in, she seemed to be having a good conversation but after a moment she shot me a look that as part incredulous, part fear.

I walked over to ask her if she needed to be backed up, and as I did this, the guy walked away to use the men's room.

My housemate was...in a word...freaked.

'He asked me if I wanted to see his c**k*"
"Just like that?"
"Yes.  Who does that?"

Now, what would you have done?  I am honestly interested because I don't think I overreacted.  I did what I would want men to do for my sister, my friends, et cetera...

I walked into the men's room.

He watched me walked in.

His words were "Don't knock me out."

Now, if he was afraid that I was going to knock him out why did he act in such a way?  Drinking isn't an excuse.  As an adult, you need to own your behavior, especially when you are drinking.  He didn't think his behavior through, said something kind of (kind of?  really) douchey and then waited to get hit.

I did convince (forced) him to apologize to my housemate. 

And he did...at one point saying that he deserved to "have (his) ass kicked."

However, why would a guy say something like this?

I hate both sexes equally right now...