this is a really basic, SFW example of what I'm looking for
http://i.cdn.turner.com/sivault/swimsuit/image/2012/OOJSguuEoIKNOkbwuVmTY.jpg
simple as that, though: a chick's butt, preferably big or very nice, pressed against a hard surface like a ledge, the edge of a counter or table, or on the...