(Only 15 year old girls opt for bikinis instead of wetsuits. They are seemingly immune to the cold, though they do look a bit strange once they've turned blue.)
If the wet suit fits you properly, others should be able to tell what you've had for lunch just by looking. Since it's so snug, it will insulate you against the cold like a neoprene forcefield!
Your face, hands and feet get nice and brown. The rest of you is white, white WHITE!
I call this the Cornwall TAN.
You see all the great looking surfer dudes, with their tanned faces, hands and feet. But believe me, under that slick wetsuit they are so pale, they are practically see-through.
How do I know this?
You're just gonna hafta take my word for it.