All thumbs.

 He's not just whistling "Dixie/"

He is burning up calories.

There's an app for THAT?

 The phone companies already have TMI.

And he's a regular customer.

Inquiring minds.

 Just making conversation, he asked hopefully.

But judging by the reaction, no.

Fact of the matter.

 If you start teaching facts,

You never know where it might lead.

Eat, drink and be wary.

 Eating disorder in pill form.

More than fifty shades of gray in their world.

Learning curve.

 Experience is the best teacher.

It is almost as if it can read her mind.

Tech Savvy.

 Keeping regular keeps the Jolly Old Elf jolly.

Moving right along.