It’s not about the underwear. It’s not about you at all.

He’s not only a pos, he’s also a moron who lacks enough imagination to come up with a decent explanation for his own deficiencies.

Bright side: you didn’t waste your genetic material by commingling it with someone who can’t even come up with a decent lie.

Most men (if I may generalise on their behalf), just want the woman they love to be naked as much as possible.

If he genuinely loved you, what you wear would have no bearing on his capacity to be faithful.

He just would be.

It’s not about the underwear. He’s just so stupid that it’s all he could come up with.

It’s not entirely impossible you could have the marriage annulled (depending upon your jurisdiction).

Speak to a lawyer as soon as you can manage it, as it usually has a time limit (at least it does in my country).

This is really unfair and awful, take care and be kind to yourself while you recover.