What hides this stereogram?

A policeman sees a little girl riding her bike and says, “Did Santa get you that?" “Yes,” replies the little girl. “Well," says the policeman, "tell Santa to put a reflector light on it next year,” and fines her five dollars. The little girl looks up at the policeman and says, "Nice horse you’ve got there, did Santa bring you that?” The policeman chuckles and replies, “He sure did!" “Well,” says the little girl, “next year, tell Santa the d*ck goes under the horse and not on it."