Hi, LeeAnne – clearly your man is either being naughty or is daring you to do something outrageous.
Not that outrageous is necessarily wrong.
As Anne points out, short garments for women are a modern invention. So are underpants.
You are free to put on underpants or not to, as you feel appropriate.
I am perfectly happy to go regimental in my kilt, but you may feel at risk of exposure.
Certainly if you wore a longer skirt, nobody would know.
And if you wore a petticoat or two (with either kilt or long skirt) you would be that much better protected.
It’s your choice to go regimental or not to, to dump the guy or to play along with his playfulness.
Regarding the sporran, there is no law that forbids women from wearing it. But except where uniformity requires it (as in a pipe band) there is no reason why women should wear one. A man obviously does need to have one on. Suit yourself.
At any rate, I hope you have fun at the ceilidh!
Regards,
Mike