Why does it smell like Updog in here?

How the joke is supposed to go:
“Why does it smell like Updog in here?”
“What’s Updog?”
“Nothing much. What’s up with you?”

Here’s how it goes when I try it:

“Why does it smell like Updog in here?”
“Does it smell in here?”
“Sure. Like Updog!”
“Are you sure it smells? Maybe it’s the change of seasons.”
“Yes, it smells like Updog!”
“Could be your allergies acting up.”
“No, it is because it smells like UPDOG!”
“I don’t think so. That’s why I like cats.”
“No, seriously, I smell UPDOG!!”
“You are crazy. Watching too many of those golf highlights of the 2007 Masters — it made you lose your mind.”
“No, that’s not it. It really, really SMELLS LIKE UPDOG.”
“Maybe you need to cut back on carbs.”
“Oh, forget it.