Gretchen, a drop-dead gorgeous new lawyer in Greg's office about whom he's having sexual fantasies. Guilt-ridden over his inappropriate thoughts—especially since it's his "four-and-a-half-year anniversary" with Dharma.
Having actually fallen asleep during sex the night before, the couple decide to spice up their amor life and procurar the city for a public place to have sex, since the rest of San Francisco will be too busy watching the finale of Seinfeld to notice.