March Reward 3 (Patreon)

Somewhere in the wide ocean is an island chain where merfolk come to breed and lay their eggs every year. It's a lucky sailor that happens by at the right time to avail himself of pleasures he can't find anywhere else. The merfolk there will welcome just about anyone inside them during their breeding frenzy.

Granted, succeeding in laying with one of Poseidon's children is something of a double edged blade. While the sailors experience pleasure the likes of which they've never felt before, they'll be forever haunted my the memory of that bliss and will never again be fully satisfied with a human partner for the rest of their lives.