Why does Freya particularlly like....

[black taz]

Taz loves it too.  He sticks him bum in the air and rubs his face around the floor.   

[MacTavish Boys]

George loves it, i gently tap the base of his back, near his tail, we call it botty pats every night, when we go upstairs to bed, he stands on each individual step and stands there until he has at least  two botty pat, spoilt, no of course not I also use it as a reward for recall, when he returns to me or whenever he has given up something, that he has nicked, 
Stephanie, George and Hamish xxx