Is it normal that i get sexually aroused by this?

I'm wondering am I normal? I recently found out that I enjoy watching my girlfriend put small stuffed toys between her legs (against her vagina, to be more precise, but over her panties, pantyhose or pants). I also enjoy to hold small stuffed toy in my hand and to "put" pressure against her asshole or vagina and sometimes to make small movements to simulate sexual action like it is licking or fucking her. I preffer that the toy has humanoid shape (head, body, arms and legs). What's this about?