Metzitzah b'pheh : This is a Jewish custom whereby a rabbi sucks on the fleshly sliced genitals of an infant during circumcision. Many infants have been known to contract diseases such as herpes from this archaic tradition
Also worth noting the article claims it's a 5000 year old ritual. The current orthodox form of circumcision is only about 1800 years old. The Rabbi's decided to make it worse when Jewish adults were restoring their foreskins in the Ancient Greek and Roman times!