AMA Answer #22 (Patreon)

I used to have Ruth make inventions for tickling like tickle chairs, or tickle beds, or automatic tickling hands. But thinking about it now... I find those boring, and I'm sure Ruth would be, too. She'd be the type to make tools that she could use personally to tickle her friends.

What's fun about having someone tickled by a machine and just siting there watching? Ruth would rather just do the tickling herself. And she likes to usually tickle her rival/roommate, Niu. They often try to one up each other. Ruth is a self-proclaimed genius, Niu is a certified genius. So Ruth would often tickle Niu to feel superior.