Is it normal that i dream about being humped by a dog?

It happened again last night, I has having a normal(ish) dream and somehow I ended up watching two dogs trying to mate and then I knelt down in the doggy position (ha. ha.) and the male great dane mounted me and mated with me.

I woke up after this thoroughly turned on and frustrated.

It's happened several times before and annoyingly I love it every time.
IIN?