Warbaby: Now how could I have missed something as important as safe words? Thank you for pointing it out.

ID: Excellent ideas. Messing with circulation can be very dangerous.

Tojo: Thank you for those links! I've not seen any of them and they look quite interesting.

And thanks to all of you for your comments. I do enjoy doing the research for these little articles and if they're of any use at all to someone here, then it's worth it.