B.C.
As someone who initially had trouble telling when my period would come - I'd go to bed not expecting anything and then wake up with bloody underwear, pajamas and sheets - it seems really silly to be throwing away anything over a simple blood stain.
They wash out fairly easily.
We don't have any blood fears or taboos, I never got quarantined to a hut or was told I was 'impure' during my period.
I think our society has gotten way too disposable/throw-it away over the least little thing.
This sales pitch is not something that works on me to get me to try a product.
http://www.wikihow.com/Remove-Blood-Stains