Help!

He: What's the difference between a semi sleeper and sleeper?
Me: The semi sleeper is just a more comfortable chair.
He: But then why is it called a semi sleeper? Why not simply call it a chair?
Me: Its not a chair...it's more comfortable and reclining.
He: But it's still a chair...
Me: Alright.....it's a chair..

I get back to my work and approximately 5 minutes later he screams.......

He: I understood the difference!
Me: Ugh! what?
He: Semi sleeper chairs have a maximum angle of 135 degrees and sleepers are 180 degrees.....
Me: .............................. (Lost for words)

Whoever asked me to marry a geek!