Women on period

[Sheldon]

So, God doesn't allow contact with a woman while she is in her period of menstrual uncleanliness (Lev. 15: 19–24).

And suppose I want to obey that God's command. How can I tell if a woman is on her period? Especially since most women take offense when you ask them.

Wow, well I know women are real, so I'd avoid offending any unnecessarily. I don't know of any objective evidence that any deity or deities exist, or are possible, so see no reason to accept second hand claims from archaic superstitions, that they can be offended. 

women 1

gods nil