Alex and Whitney meet up with Roxanne, Mark and Lily at Low Bar. The gang is engaged in a contest to see who can take the funniest cell phone photo. Whitney takes the phone into the bathroom and comes out with a photo of her butt. She wins the contest; but Alex is upset with Whitney for displaying her posterior to all of their mutual friends, and they leave in a huff.
Back at the apartment, Whitney defends her decision to photograph her own butt as a joke. Alex, on the other hand, is fuming. To get back at Whitney, Alex decides to take a photo of his penis. While he's in the act, Roxanne and Lily barge in looking for Whitney, and they see everything. Alex is mortified.
Alex becomes paranoid because Whitney and her friends are making fun of him online. Whitney catches Alex snooping through her emails to see what she and her friends are saying, and she becomes very upset at the invasion of privacy. Whitney calls Alex stupid, so Alex calls Whitney crazy. Neither of them appreciates the hurtful criticism.
Back at Low Bar, Mark discovers that R.J. is afraid of spiders. Mark goes down to the basement and returns with a huge spider on his back. After shaking it to the floor, Mark and R.J. argue about how to kill the spider. Lily and Roxanne arrive and are delighted to see a tarantula on the floor. They pick it up and play with it, making R.J. and Mark look like complete sissies.
Whitney and Alex finally talk about their argument. Whitney reveals that she hates being called "crazy," and Alex reveals that he hates being called "stupid." In fact, he remembers every single time in the last year that Whitney has called him stupid. Whitney apologizes and promises not to call him stupid anymore.