Found this great video explaining what the moment of inertia means, a helpful concept to keep in mind when deciding what shape handle to attach to a mug. The upshot for me & the way I explain it to my students is that, the further the handle is out from the body of the mug, the heavier the mug will feel. It's part of why 4-finger handles, though intuitively it seems they would feel more secure, often feel like you have to grip the handle more tightly - so they are less comfortable, mentally & physically. (The other reason is there's no finger left over to go under the handle for balance.)
Yes, I know I am a snore. That's why I have a blog, so I don't accidentally bore my friends right to death.