Taub shows the films to House and CTB. There is some Insane Clown Posse, but no masses. House sees a bowing in the wall of the fourth ventricle (apparently brains, like hearts, have ventricles) as Foreman and Hadley return with some pictures of their own, from the strip club. I've never been inside a strip club, but I'm pretty sure you're not allowed to take pictures there. Hadley tries for an invite to the party, but CTB says no and House goes with her. Then she says that if she gets drunk enough, she could make out with a stripper or strip herself. House revises his no-skirts policy to allow her to go, and Foreman gives Hadley a wink, so either he's into this or they've got something planned. I'm just annoyed because it means that Hadley has somehow managed to shoehorn herself into yet another scene where she doesn't belong. Meanwhile, Taub keeps trying to focus on the actual case. House sees a picture of a stripper and he and CTB say "oh, god, not her" in unison, which leads to a joke about Bernie Madoff that was probably timely when this episode was written. With that, Foreman agrees with Taub that they shouldn't do the brain biopsy without evidence of cancer and House orders them to do it anyway. They don't think the mother will agree to a risky procedure on her son's brain on just House's hunch, but CTB remembers that Seth broke his nose a few years ago and they can use the MRIs taken back then to look for cancer. I'm not sure how older MRIs would show a tumor that newer ones do not, but okay.
Wilson decides to council Chase about marriage and bachelor parties. He's kind of an expert, having been married multiple times. He eloped the third time, he says, solely to avoid House's bachelor party. He may also have eloped because let's face it -- it's not easy to get guests to buy presents and waste a weekend attending your third marriage ceremony in like five years, especially if you haven't returned their gifts from the first two. House interrupts with films of Seth's brain from now and back when he broke his nose for Wilson to look at. While Wilson studies them, House figures out that Chase is there to be discouraged from letting House throw his party and argues for it, saying that only by looking at strippers and getting wasted the day before his wedding will his vows truly mean something. Chase calls this evil and leaves the scene just as Wilson has finished looking at the films. There's bowing in the fourth ventricle of Seth's brain that wasn't there a few years ago, which means there is definitely something recent causing the bowing. This also explains why they needed the old MRIs in the first place. Now that they've got a reason to do the biopsy out of the way, Wilson informs House that he will not be attending the party because House parties only lead to embarrassment for Wilson. Last time apparently involved a duck somehow. Tragically, there is no flashback to this event.