River of life..., Why is using your OWN blood taboo? Options

Lets face it, blood is one of the most metaphysically powerful substances a witch has access to. And it is HERS (or his). So what is the hysteria that is so prevailent these days about using your OWN blood in rituals to add power to it. i can see in the old days when witchcraft was first struggling to come back and gain acceptance and they wanted to seem as bunny fluff as possible so that there would be no violent reprecussions. But we are past that stage now. i understand that wiccans don't want anyone to think that their Godess demands blood, but i am talking about witches. Blood freely and joyfully given is a powerful tool and i think it is a shame that we are letting fear ruin it for us. Now i know that it is a touchy subject for alot of people so, please, lets keep this as a friendly discussion. Thanks all

If you can get blood so easily doing it with a pen thing or a lancet, why do they still stick a needle in you in hospital to get blood when it is often hard to find a vein?

It's a matter of quantity. Since lancets are used primarily for testing one's blood sugar, they are designed to yield a few drops, unless one milks the prick for all its worth (yes, I do know how that sounds).

What advantages are there in using blood for your magick?

Blood is the one substance with the most powerful symbolic link to power. That sort of link, as ancient as it is and as ingrained in the human psyche, is going to unleash all sorts of power, IMHO.