A KL Marathon Joke

I was barely sitting down when I heard a voice from the other stall saying: "HELLO, are you going for the KL Marathon?"

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, "Yes I am."

And the other guy says: "So would you like to pace with me during the KL marathon?"

What kind of question is that? At that point, I'm thinking this is too bizarre so I say: "Uhhh, No Thanks but I am straight and perfer girls!"

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 could just 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!!!"