Ben Caxton had thought himself to be sophisticated about such things.  Swimming without suits be considered only sensible.  He knew that many families were casually naked in their own homes - and this was a family, of sorts - although he himself had not been brought up in the custom.  He had even (once) let a girl invite him to a nudist resort, and it had not troubled him especially after the first five minutes or so - he had simply regarded it as a silly lot of trouble to go to for the dubious pleasures of poison ivy, scratches, and an all-over sunburn that bad put him in bed for a day.