It is MORE hygenic to wear underwear under a kilt, for the cleanliness of the kilt. Sweat and all else that can get on the kilt when regemental necessitates frequent cleaning, and depending on the kilt, cleaning it on your own may not be easy or effective.

In the old days.......they barely took baths, so who cares what was on the kilt!
Washing the kilt was a walk through the Loch!

It is just a statement on where we are now!

Take it as YOU want it, it's YOUR decision!