the big questions and the big answers

x: what is it in a yawn that makes people want one...you know...a yawn?
me: (yawning) im not sure actually
e: its probably desire
me: did you just say desire?
e: yes
me: do you even know what desire means?
x: it means you really really want something
e: yeah
me: so, e, you think that you yawn because of desire?
e: yes
me: are you sure you meant desire? or was it another word you were thinking of?
e: oh yeah. i meant peanut butter