Best tools for bruising

[annie]

I have a fetish for bruises. I love seeing beautiful blue marks over my lovers body, of which I'm am responsible. Here's the question:

Which sex toys make the best bruises for the least amount of pain inflicted? My goal is to bruise as much as possible while not oversteping my subs limits. Or maybe it's not just the amount of pain that's the factor, more like the kind of pain? Not being a spankee I'm really not in a position to know.

I've got a wide variety of toys and I'm damned if I can see any obvious system here. Is the thickness of skin a factor in which impliment to chose? or does thick skin only mean I've got to hit it harder?

Any advice would be apreciated.
thanks

Tom the only thing i know for certain, at least for me, is that when i am thin i bruise MUCH easier and for MUCH longer because there is less "padding"... doesn't seem to matter at that point what tool is used... so yes i would say the padding behind the skin is a factor...