Sticky Kitty explains why she likes to be spanked:

Very simple:

It feels so nice on my bottom.

I like the ones that “thud” right in the middle of my ass.. very close to certain sensitive areas. Thats what it feels like… a “thuddy” feeling. Its the kind of strategic smack that stimulates you from the inside out. Its like a resonating inside my body, kind of like when you hit the body of an acoustic guitar. Its hollow and deep, and causes a vibration in the strings.

Loyal readers (all who are still here, that would be) are invited to share their reasons in the comments.