Ninjaii,
you asked „Are married people obliged to disclose their “number” to their spouse? “
No.
I don’t care how many people my partner slept with, why should that matter to me? I would expect my partner to disclose if he/she had contracted some kind of STD. Otherwise I would be proud that I am the one he/she chose to marry in the end.
As to you last question:
“Still, if a spouse (or spouse-to-be) were to directly ask, should the other person give their number?”
No.
This is nothing that would impact a partner personally (like STD would, or the question if someone has debts). It’s in the past and over. A spouse can choose to disclose this information, but the partner doesn’t have a „right“ to know.
Though I run this site, it is not mine. It's ours. It's not about me. It's about us. Your stories and your wisdom are just as meaningful as mine. 