I think this a "whatever floats your boat" kink / fantasy. For me, it is top 3 for sure. I wish I would wake up one day with a 1" - 2 cm clit as thing as a cigarette. Of course it would be permanently in chastity, but I guess it helps for kinks like SPH, going to the nudist beach and be seen by both males and females..
Anyway, this is what I managed to achieve in less than 8 months ( only trying to stay as much as possible I can - so far I am currently locked in it since November the 30th, only taking it off for cleaning). At first it was a real struggle to get into the first one, now it takes me under 30 seconds to get into the flat one: