Yossarian: The Great Zawn is awesome and the climbs in the back -
Desolation Row,
Candy Man, etc. – are tucked away from the sea and not as committing as the Main Face. They’d be good as a reasonably mellow introduction. There’s a fine collection of single pitch routes at the base of Commando Ridge:
Kohima (E3),
Imphal (E2),
Gallipoli and
Anzac Day (both E1). So if you choose not to ab into the Zawn these ones are a good option.
Pordenack’s a nice spot too, once when I was climbing there I saw a pod of dolphins jumping clear out of the water, doing back flips. Maybe they were prudish dolphins trying to give your mermaids a wee bit of privacy! The only confirmed mermaid sighting I know of is in Zennor but alas, that merrymaid is heterosexual and seems to have a thing for choirboys!
The story has been immortalised in a carving on and old wooden pew and of course you’ll know that anything commemorated in effigy in a church must be true.
I did find
this website with some excellent examples of underwater love but unfortunately the maids pictured seem to have feet not flippers and I guess you’re more of a breasts and fish-tails rather than a legs and arse man.