What you have to remember, is that (unlike 99% of this forum) I'm a man, and I find it a tad offensive that you females are often insecure and basically accuse all men of being perverts.
It's simple, if you are in doubt, don't do them, there are numerous posts about the same subjects and it gets a little tiresome listening to (what could be deemed as sexist comments), when, if the shoe was on the other foot you'd be carrying on like Canaries exposed to gas is a Durham coalmine.
Some of the enquiries you get are quite valid, as inexperienced/insecure clients (particulary men) have many questions, just as i'd imagine you would have.
Or should I dismiss you also based on your curiosity.
With massage its the whole stigma of it and its a dreadful shame for those men that genuinely want just a good massage with no ulterior motives.They usually end up paying double for a lot less time by going to osteos or physios when really they just want a good strong massage.
Things are a lot better now but i constantly used to have raised eyebrows when i said i massaged men and yes they were often naked apart from a towel because i worked in a health club where they didnt have to wear anything in the wet areas.My boss and all his family were respectable naturists.
Most men were so pleased they could get a decent massage without being offered any thing else.