Then again, the entire concept of menstruation is fucking disgusting. And actually everything to do with biological reproduction in general. It's all disgusting.
So is eating. And digestion. And excretion.
Aging is utterly appalling.
Death is completely gross.
I'm not actually sure where I'm going with this. Maybe I'm thinking that you can't worry yourself too much about whether it's a disgusting concept or not. Really all that matters is how well it works.
Doesn't sound like it works too well though.