i know that bondage is kinky to me but i wouldnt say it was too kinky. Honestly Andy, its about how the person feels about it and what they see as being dirty/ kinky.
kinky is dependent on yourself, kinky for me is everything i really like but theres things like torture which is too kinky for me or latex costumes which is good for me but maybe too kinky for others
to me kinky is something that you've maybe never done thats beyond the boundaries of your norm, but you're keen to try. I also think that once you've tried your kink, and if you liked it enough to try it again it's no longer kinky to you, but becomes within your normal limits, if you see what I mean. It's all down to personal interpretation to be honest but that's how I see it ;O)
I've thought about this recently. People's bounderies are all different. With my cuirrent GF for example we have restraints, a whip, done light choking, anal, denial, rape fantasies etc. Recently she's wanted to try some anal play on me however when I raise the idea of me wearing lingerie with her she doesn't like it.