This is the highlight. Dive off the transom. The sensation of water flowing over 100% of your skin is uniquely therapeutic. Warning: Saltwater enemas are real. Do not sit on the swim ladder facing the water while the boat rocks.
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Reality: This is the biggest hurdle. Naturist sailing is about as sexual as a YMCA swimming lesson. The cold water, wind, and physical focus kill any eroticism quickly. This is the highlight