Any guy who has the GUTS to show up in a kilt to date my daughter is OK by me, so long as he is wearing his sporan, and his blade. Give me a little warning, and I'll have some pipers ready...
You may give him credit for GUTS, but don't forget, kilts are typically a "commando" type of garmet.
That is understood. Let's face it, a zipper and a pair of underware are going to make very little difference. What is going to make a difference is their attitude. Basically the word no - unless you are willing to chaperone them (which is a valid thing to do)
Basically, you have to raise your child up right. One reason I think the "fathers of daughters" are so paranoid is they remember exactly what they were like at the same age. Sigh