Yes, we kiss on the lips all the time. Aneko won't but Millie and Chester do!!! They'll both slip you the tongue too, if you're not careful. Of course, if they get a bite of people food it's on our forks so we obviously don't mind all the butt licking, foot chewing and God knows what else. After all I eat dead animals (meat)! Now, if I see someone lick a private area, I at least wait a bit before allowing a kiss to dilute the yuck some.