Down with your shoo-fly Sign of the Cross!
Away with your stealth-fart genuflection!
I vanquish your Hail Hydra sign of peace!
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On a more serious note, here is an interesting passage, from a very good book that I had read many years ago, but could not find again until last night:
“Through the medium of blessed water, the Church transfers a priest’s blessing to the faithful, remitting venial sins, just as the water sprinkled by Hebrew priests purified unclean persons and places. For the same reason, we touch a drop of holy water to ourselves when we make the Sign of the Cross on entering a church–but not necessarily when leaving after Mass, because receiving the Eucharist remits those same venal sins. You need to be cleaned on the way in to the sacred mysteries, not on your way out to the sordid world.”
— Kevin Orlon Johnson, Why Do Catholics Do That? (1994), p. 220.
What say ye?