Well i'm a foot guy...a lot of the mps i see, i usually ask before the appt. and they usually wash up and give me a foot rub. Or even sps, if you want...
I love it...and they love a good foot massage as well...
From catching anything...well they're always on their feet for the whole day...and they'd love a good massage from wearing their high heels all day long...but as long as they wash up...it's not a problem...otherwise there is bacteria and sweat (unless you're into it) that can cause rash or whatever depending on how sensitive your skin is.
Try StudioB, but for the footfetish, it's $80, and automatically nude, and they're amazing, the release is either a massage or by their feet, up to you...but they don't wash up.....