JohnnyPolite  

Heya dude. What do you think of that new guy at work? I haven't worked with him yet.

Don's a cool dude. he knows what's best. Check this out: We were standing around, and he says to me "I think I'll have sex with your girlfriend."

...

Yeah, so, I said, you know, I don't think that's a very good idea. You know, I'll share a smoke, but not my girl, right? He says "Whatever." Long story short, he sleeps with her; Don knows best!

How is that knowing best?

... What do you mean?