Other proposed explanations have been that the power of the vulva is a protective force. Or a wildly different interpretation that the proud hag serves as a warning against lust.
Basically, nobody really knows why these carvings were so popular.
@guenther @vagina_museum The gods his story is based on generally have a Water-Mother-Goddess for a mum, and I've never seen Síle used as a name for that kind of goddess. So my guess would be a wife. But I've also never seen a Síle mentioned yet in the mythological or hagiographical matter, either. So.. Who knows? :)
Lugh did have at least two wives, what's one more..
https://buttondown.com/godsandcroziers/archive/mar-17th-patrick-lugh-lugaid-purusha-cosmic-man/