This reminds me of when I was filling in the representation survey at my first full-time job and there was a question about sexual orientation. The options were :
a) prefer not to answer
b) heterosexual
c) homosexual
d) bisexual
e) other
Being young and naive, "other" filled my head with all sorts of terrifying possibilities of what people were into fucking if it wasn't their own gender, the opposite gender or a bit of both.
I'm not sure what made you assume that the poll was set up in any particular order giving value in any way to one or another, I was just curious about what people consider limits and threw a few things I've seen discussed up there for response.
All. Why do you need to shit, piss, vom, degrade, or abuse the person you're with. Now you're equating them to something that is less than you.
Why don't you just waterboard them while you're at it? She's not an terrorist...