my 2 cents...

I wore pants ( hte equivalent of non-regimantal) for until about two years ago. My wife and I had been trying to hav a child for years until I started wearing the kilt almost full-time ( about a year and a half ago).

I now have a beautiful 3 month old son, concieved without any medical assistance.

basically, regimental is the way to go. Keeps "the boys" in proper working order!