It's a few years back now and I can't remember the case that provoked the following but it was either a cop or lawyer who said that any man who'd bathed his (or any) children was sitting on a time bomb if there was any "dispute" in later life. By that he meant that they were wide open to accusations of improper behavour with no means of defending themselves except simple denial.

What is "vulgar" is open to debate. In the minds of some, any nudity is "vulgar".