For the guy that wanted bondage, try one of these:
緊縛 (kinbaku)
束縛 (sokubaku)
ボンデージ (bondeji)
ボンテージ (bonteji)
縛り (shibari)
しばり (shibari)
I believe each of those works. The ones for "shibari" are more likely to give you rope harness pics, I believe.

Also see this:
拘束 (kousoku): "restraint"


And here are some of the more extreme ones, if I remember correctly. Haven't tried them in a while, they might not still be accurate.
飲尿 (nonyou): "urophagia" (piss drinking)
食糞 (shokufun): "coprophagy" (shit eating)
And some pipelining ones:
ホース連結 (hosu renketsu): "hose connection"
チューブ連結 (chubu renketsu): "tube connection"
永久機関 (eikyuukikan): "perpetual motion machine" (not sure about the translation)
If you combine the last one with either of the first two, it returns some links to ass-to-mouth pipelining pics.
Don't know if there are any better pipelining tags, unfortunately.

And a few other fun ones:
拘束衣 (kousokui): "straitjacket"
マミフィケーション (mamifikeshon): "mummification"
水着だから恥ずかしくないもんっ: "because it's a swimsuit, I'm not ashamed" (shibari-style swimsuit)

>>7563 Another one for that first thing would be:

真空パック
I believe it translates as "vacuum packing", and seems to be used as "vacuum bag".