App updated! My little dude, Has put on clothes - No longer nude!

Builders wield this with aplomb, but not as well as Thor.

I greet everyone without a word. I am stepped on by strangers and loved ones alike. Those who use me the most rarely look me in the eye. Some see me as protection, others as an invitation. Treat me too kindly, and you might become me. What am I?

I wanted to write a dirty riddle. I mean this one would have REALLY raised eyebrows. A riddle so scandalous, so sultry that I might be charged with indecency under international law. Illegally sexy...

A tiny whisper on four small feet, In silence prowls where crumbs retreat. Or with a computer I'm not too bad, Leading your pointer on a pad.