Not a single joke?! Are you kidding?
I guess you need some help here:
The one guy didn't know where the Rocky Mountains were, so the other guy said they were in Philadelphia, cuz that's where Rocky took place.
The one guy said "somebody's been taking *****y pills". Ok so this one works on two levels. First, he said somebody, but we can all infer that he was really talking about the girl. It seems like he isn't sure who exactly has been taking *****y pills, but we the audience know he's talking about the girl. This is called ironic humor. Second, the notion that there would be PILLS tha one would take, like on purpose, that do nothing but make on *****y, this preposterous. This is called absurd humor.
The one guy shows the girl how to rub her feet. How do you not get this joke? He's a MAN. It goes against the typical male purview to know what she's doing, much less that she's doing it WRONG. Can you imagine? This would be enough for a lesser show, but he then goes on to show her how to do it, and he's RIGHT. This is a slap in the face to traditional gender norms, and is lampooning the very notion of masculinity.
The problem with the BBT haters is that they have such an underdeveloped sense of humor that they feel threatened by the multilevel nature of the humor, and since they can't begin to process what they're seeing, they dismiss is out of hand.
I suggest you go back to your Arrested Developments and 30 Rocks were the jokes are tied up in nice little bows and hand delivered.