Do dogs like to be tickled?

I can scratch my GSD's chest and she thumps her leg a lot! Its kind of entertaining, and if she doesnt like something she lets out a small growl. She doesnt growl when i do that, and she licks my hand and face afterward! Its a good way to get her to roll over, to wipe her belly with a baby wipe! But do you think she likes it? All my other dogs like it! How do your dogs like it? Thank You!