Its fine to massage the legs front and back, most men usually get an involuntary erection, its usually more embarrassing for them than me, I just carry on and don't mention it, its just an erection at the end of the day and they don't bite - usually ;-) lol
As long as the guy isn't laying nude and undraped or fiddling around under the towels, I don't see a problem.
You can usually suss the pervs pretry quickly, they'll want to be undraped, nude and or drop huge hints like "just a bit higher up my leg please" when you're massaging the upper thigh.
I have had a few of them unfortunately, I didn't make a big song and dance, I just stopped and asked them to get dressed and leave. Most male clients just want the massage and if you make the effort, they are loyal x
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