I like this idea! Not because it was the way women were crucified all the time, but because it might not have been uncommon to see crosses like that.
For some reason, the “women-facing-the cross” idea took root in the world of Christian preachers, but I’ve never found any evidence for the notion.
Some say the idea was to protect the crucified woman‘s identity and honor, but that seems to contradict the whole point of crucifixion. I also fail to see how having a woman’s naked ass hanging out while she engages in a sadistic parody of sex with a cross in between her knees preserves her honor in any way.
Others say that men could not bear to see a woman in that much pain, so they just turned her around. Once again, seems to undercut the purposes of crucifixion, and I highly doubt most men were so earnestly noble when they saw a crucified woman.
Historical fantasy it may be, it doesn’t change the appeal to my cross-as-phallic-symbol predilections.