Season 2, Episode 11 — Look at the Princess, part 1: A Kiss is but a Kiss
John and Aeryn’s on-again-off-again relationship boils over just as the crew arrives at a planet where the chief means of entertainment at the moment seems to be determining a couple’s sexual compatibility. Compatibility (genetic, romantic, or otherwise) immediately becomes a major plot point as the culture and politics of the planet shape the way each crew member understands what it means to love and to be loved.