Also, why don't tentacles have their own separate section instead of fitting under Fetish-Other?

also why do people put tentacles under 'bondage'?

Because tentacles can bind and secure people much like ropes can, I guess. Living ropes with penises on the end.

yeah but its a tentacle fetish, not a bondage fetish, at least in my book. i dont get off to tentacles, but i get off to almost anything if it contains bondage. but theres also the matter of people not tagging their things at all. general art catagory, no tags, no description.