Folks have been siphoning using their mouth for many, many years... but the human mouth is a nasty thing. When I was a young working in the Emergency Room at South Georgia Medical Center, we would get people who had been bitten by a dog. The Good Doctor would usually sanitize it, stich it if necessary, and bandage it. If it was a human bite, yes we got plenty of those, the Good Doctor would sanitize the wound as best he could, but he would not stitch it up until he was sure that there was no staphylococcus infection. Once again, the human mouth is a nasty thing... especially ArcticSid's.