Not All Bubbles Are Fun

Conversation that took place in the back seat on the way to school today:

Little Man:  Look!  I can blow bubbles with my spit!  Can you?

Big Bro:  Yeah.  Mine are bigger.  Watch this one.   

Little Man:  What if we could blow bubbles with out butts!? 

(Hysterical laughter, snorts and guffaws)

Big Bro:  Then Dad's Butt Bubbles would be HUGE!!

(More hysterical laughter)

I did not participate in this conversation.  But had I chosen to make a remark, it would have been something to this affect:  

"Yes, Dad's Butt Bubbles would be huge!  They would also contain an incredibly noxious, nuclear-like  odor that could lay waste to an entire third world country in about 5 seconds flat.  I know, because I sleep in the same bed as the man.  And apparently, night time is the best time to practice butt bubble blowing, because I notice that's when he does his best work."