"'Wanna Fuck?' 'Sure!'" it ain't--unless, of course, that's something that the parties have sorted out in advance.
Just another data point against its icky-ness.
Curtiss
Yoshie on consensual S/M:
> Consensual S/M is the opposite of slavery, in that, unlike in
> slavery, the bottom is not enslaved by the top. S/M is a
> role-playing game, in which practitioners freely choose their
> favorite roles and define rules together (between S/M partners and
> within S/M communities). Slavery, unlike S/M, wasn't a game, and it
> insults the enslaved to conflate the two.