I want to know who Joe really is.
Why do you want to know more about Joe?
Well, he's my boyfriend. Don't you think I should want to know more about him?
It's perfectly acceptable to want to clarify any doubts that you have about someone. It's good that you're asking questions and being curious about the person you're in a relationship with.
Thanks for the info dude.
You're welcome. I hope things work out with you and Joe.