On last night's episode, Hef joined the girls around the "campfire" (which was actually just a fire pit), where they offered him a S'more. Apparently, in all of his 83 years, he had never heard of the delicious, outdoorsy dessert.
Anyone notice how the girls kind of yell when they talk to him? This new batch of girlfriends don't seem to have the kind of close relationship that Holly, Bridget and Kendra had with Hef. In fact, I'd go so far as to say that, sometimes, the antics of the twins borders on elder abuse.