Charlotte panics about her 'bed-manner' when her lover Dr. Bram Walker dozes off in bed once after a grueling day of surgery, so she takes a tantric class - signing up all four girls; it's given by hands-on demonstration by a couple of psychologists. Sam not only proclaims the dawn of pan-sexuality, but actually accepts to have a trio with gay couple David&David, flattered they call her probably the best in bed, but they walk out just when she was running hot. By coincidence Carrie bumps into (the cigarette off) very cute film composer Patrick Casey, but is puzzled how reluctantly he takes further steps, till he confesses to be a recovering alcoholic, but when she is the one hitting the breaks... Written by
Did You Know?
Throughout the series, we hear Carrie refer to her apartment on East 72nd and 3rd Streets - towards the end of this episode, her date walks her to her building as we can see a distinct "W 4" (West 4th) sign behind them. See more
[on the subject of Charlotte's boyfriend who fell asleep during sex
Of course it's her fault and I can't say I'm surprised. Have you seen her on a stairmaster? Nothing happening below the waist.