I too have been a smoothie for a few years now. I find that it accentuates the feeling nakedness, especially outdoors.
For those who want to try it but are afrain of taking a razor anywhere near their more sensitive area, you can always try a depilation cream such as Veet For Men. It is not actually intended for that area and if you leave it on for too long you can end up with a little burning, not unlike razor rash, but stick to the recommended 4 minutes and you should be fine. If you need a 2nd application, wait 24 hours.
my experience is that it seems to be more accepted to be nude on a mixed beach (both textile and nude ones) if You are a smoothie. I don´t know why, but perhaps it depends of that it looks not so vulgar if You are totally hairfree - like a litle girl or boy. what´s Your opinion/experiences?