The river's gurgle becomes a symphony of lust as hands work feverishly, spreading pre-cum along throbbing lengths. The sun's rays dance on the water, casting shimmering patterns on the flushed skin. The first orgasm arrives, a powerful pulse that sends cum arcing into the river, a sacrifice to the gods of carnal delight. Another follows, and another, each one painting the riverbank with evidence of the solo debauchery.