For the same reason that I like a back rub. It feels good. Dogs respond to affection just like we do. They want to be loved. A good belly rub lets them know that you love them.
http://wiki.answers.com/Q/Why_do_dogs_like_their_bellie...
Dogs question: Why do dogs like tummy rubs? Answer Who doesn't like their tummy rubbed? ... Why do dogs like to have there tummys rubbed so much? What does the priest say when he rubs the chrism oil? Why does your dog lie on her back for tummy rubs all the time?
wiki.answers.com/Q/Why_do_dogs_like_tummy_rubs wiki.answers.com/Q/Why_do_dogs_like_tummy_rubs
Well, actually I do kick my leg if I get tickled in the right spot of my stomach. I guess, if dogs could talk, they’d say, ... try this if you have a big dog: lay across him like you are using his upper back as a pillow. rub his belly ... I’m not much for getting my belly rubbed but I love a good back scratch now and then.
help.com/post/105160-why-do-dogs-like-it-so-much-when-y... help.com/post/105160-why-do-dogs-like-it-so-much-when-yo
Find out why hunting dogs don't mind suppressing their basic instinct, how assistance dogs for the blind get their job done, why little dogs like to mix it up with big dogs, and everything you always wanted to know about canine sex but were afraid to ask. ... Why do dogs like to have their ears and tummies rubbed? 75 (2)
www.ecampus.com/book/0757305725
Training Tips for how to understand dog body language and postures, from Stacy's Wag'N'Train ... Since dog-dog play is very similar to serious things like fighting, hunting and reproducing, dogs have good ritualistic ways of demonstrating that their intentions are peaceful and fun-loving.
www.wagntrain.com/BodyLanguage.htm
Rolling over --– When dogs rollover, exposing their tummies, it’s a part of their declaration of love for you. Your dog is saying; “I trust you” and would appreciate a tummy rub. Tip 3.1—To encourage your dog to rollover on command, say ‘Roll’ when he does.
petcaretips.net/games-for-dogs.html petcaretips.net/games-for-dogs.html
Again, this is why cats are hard to train (besides litterbox training, that's like instinct to them!). They see you as a provider of food and friend, not as someone who controls his or her life. This is also why cats don't like their tummies rubbed. ... Like cats and dogs, they also have a long hair or short hair. Care info;
www.epinions.com/content_4009861252
They would search for their keepers, climb on them, take food from them, roll over to get their tummies rubbed...they behaved like dogs. Even more surprising, they looked like dogs. Their tails turned up at the end, like a dog's.
www.sff.net/people/s.kroupa/Review-dogs.htm www.sff.net/people/s.kroupa/Review-dogs.htm
I have 3 dogs- Buzz, a Rottweiler and Doberman mix, Shyla a Beagle and Jack Russell mix, and Cowboy, a full-blooded registered Australian Cattle Dog( Blue Heeler). I love my dogs they are like my best friends. Buzz is 6 years old, Shyla is 2 years old, and Cowboy is around 6 months old. ... She likes getting her belly rubbed.
www.loveyourdog.com/ourdogsa.html www.loveyourdog.com/ourdogsa.html
Aren't dogs so cute and how they like there tummies rubbed? ... Dogs Have a Sixth Sense ... I Like Dogs...
www.experienceproject.com/question-answer/Do-You-Know-S... www.experienceproject.com/question-answer/Do-You-Know-Someone-That-Can-Bite-Hisher-Own-Elbow/83196