Roxy has never humped a person or anything other than her big toys, They have to have a large body, head and rope type legs!! She has had a few like this, the latest being a reindeer from xmas!! We thought she might stop after she was spayed but she hasn't!
I have to say we find it quite amusing and have always just let her get on with it!! She is very determined sometimes and grips him tight with a paw so she can thrust away!!
Of course the first thing she does when we have visitors is grab Mr Reindeer!!!!!
I guess he knows were he is in the pecking order!!