Jokes - Conversation over Phone

I was barely sitting down when I heard a voice from the other stall saying:"Hi, how are you?"

I'm not the type to start a conversation in the men's restroom but I don't know what got into me,
so I answered, somewhat embarrassed, "Doin' just fine!"

And the other guy says: "So what are you up to?"

What kind of question is that?  At that point, I'm thinking this is too bizarre so I say:  "Uhhh, I'm like you, just travelling!"

At this point I am just trying to get out as fast as I can when I hear another question.   "Can I come over?"

Ok, this question is just too weird for me but I figured I couldjust be polite and end the conversation.  I tell him,
"No........I'm a little busy right now!!!"

Then I hear the guy say nervously...
"Listen, I'll have to call you back.  There's an idiot in the other stall who keeps answering all my questions!!!"