Speedos at nude beach, here are my thoughts:
Saw men nude on the sand, but put on speedos going into water, came out taking off again. Protection, as family jewels were out of sight in mystery, underwater.
Some people want to try nude, but not mentally ready. So remain wearing speedos.
Nude beaches are tour sites especially in the US. Small groups 2-4 people remain in swimsuits as they were sightseeing as tourists, taking in the experiences.
Some people just came in to watch naked people
I have seen ladies with top bra swimsuit on but nude bottom
But their freedom, I am not judging.