As a teenaged polesurfer back in the 80's, one of my deepest fears was that my skin-coloured wetsuit wouldn't disguise random unwanted erections...

My hormones have since settled down, and I can now wear spandex over my nappy-like seat harness with confidence.
I can understand why the new-generation of kite grommies would want the reassurance of loose-fitting boardies.
On the other hand, wearing a kilt over the wettie might getcha more 'floaty' jumps...