I could give him a reach-around... on his calculator I mean...

Just lean in and... "Here, you can't really do a gradient with a function," Oh my god, can he even tell my bare tits are against the back of his neck? "You have to just set it up as a regular derivative in each dimension and..." Fu-uuuck...

"Oh, hey, I see, that makes sense!" Holy fuck, Jeff, I am so fucking aching for your cock right now... "So we just do that in both directions..."

Mmm... Just let my hands wander down as he chugs away at his calculator...