>>5122693>omg grossThat is the argument against any sexual perversion, really.
And if people didn't react that way, we'd have pedo marriages, animal marriages, master/slave marriages and tons of other fucked up shit.
There have to be boundaries.
Allowing homosexuality (which is rather common), should not also be a premise to allowance of other deviations (which are quite rare).
Otherwise you have to admit that /pol/ is right with their "slippery slope" stance.