Jerry Seinfeld made the rounds of New York City comedy clubs on Monday night, which meant one thing: He was prepping for an appearance on Late Show with David Letterman. That happened last night.

Seinfeld turned his observational wit to how cell phones have become part of our very persona. Also, he proved that if you wait long enough, then you’ll once again be the only comedian with a *69 bit. Seinfeld also dipped deep into his well for his bit about Cialis. Roll it.

Seinfeld also sat for panel chat with Letterman, who wanted to know why Seinfeld is filling in as Regis Philbin’s host and BFF instead of Dave? Roll it.