the logic is.....
It is not only practised in Scotland, I;ve sent you a PM about this, and we can discuss it further if you like.
If you care even to do a very basic search on google you will see what I mean
Handfasting is primarily a pagan or celtic ceremony, that doesn't mean it is Scottish, and there are many such cermonies all over Ireland and England, and even in the USA!!
I have been involved in several of them and not one of them had anything to do with Scotland