Thazriah-Metzorah: Privacy

 The Klee yakar  associates the word nega - affliction  with the word negia - touch

The parshioth  deal with the results of secret touches.  It starts with the ultimate public announcement of the most secret of touches - the birth of a baby. 

The next section deal with tzaraath, the affliction, the contamination.  This is a visible mark on the skin, the touch of heaven.  The text does not identify a cause, but Chazal suggest that gossip  and other secret offenses cause these visible blemishes, marking the victim for isolation, a living demonstration of the danger of touch. Contagious!

The parshioth then switch to gonorrhea. The rhea in  Greek  is  flow, in  Hebrew zav  We understand the origins  of this flow to be private touch with the wrong person.

The private becomes pubic in the purification ritual. No secret is secure.