Mark Foley, in the middle of a House vote on HR 1559, Emergency War Time supplemental appropriations.

Maf54: I miss you
Teen: ya me too
Maf54: we are still voting
Maf54: you miss me too

ABC sadly edits the bit where they "both appear to describe having sexual orgams" (as opposed to the other kind), but we do get to bask along with them in the afterglow:

Maf54: ok..i better go vote..did you know you would have this effect on me
Teen: lol I guessed
Teen: ya go vote...I don't want to keep you from doing our job

Maf54: can I have a good kiss goodnight
Teen: :-*

Here's another archival video we'd like C-Span to dig up.

New Foley Instant Messages: Had Internet Sex While Awaiting House Vote [The Blotter]

Photo-illustration by Ben Stanfield, licensed under Creative Commons