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Oh yeah, then there are urine enemas, some people also inject their own blood into their muscles (thighs or buttocks) with alleged health benefits. I don't object, but haven't gathered enough info on it to be for or against it.
One thing I have been doing, though, since childhood days, is pee on my finger when I cut myself. And yes, usually mid-stream, though I guess more out of practicality.

Never heard the blood thing. I don't think i could ever do anything with a needle. ... :/

amaroli google