Years ago I had a girl friend who would stuff her vagina full of peanut butter and let her german shepherd lick it out. It was hot to watch her do this -- she would orgasm continuously for about 20 minutes.
Caught my cousin in a compromising position with her big German Shepard a long time ago on the ranch, after she found out I knew of her indiscretion, we had a talk and she told me that brutus (her dog) was an awesome pussy licker and she let him fuck her in return favor for a great time, she even took the knott quite often.
i used to mess around with my k9's as a teen. cover my shaft with bbq sauce or jam something very liquid easy to lick off. the smaller they are the softer the tongue. would for sure recommend it for a good time.