It's easy!
about three years ago i was at a "suit-up" - themed party.
i had a fancy jacket, shirt, pants, hat, and also a tie.
but during the evening i partied so hard the tie had loosened and i couldn't knot it, so i folded it up and put it away in my vest.
some time later....
Apparently the neighbours had complained about the noise and two police officers came by to tell us to turn down our music a little, they were very friendly and they both wore a tie :)
I was drunk, but awesome drunk; the kind of drunk where you do awesome things...
so i stepped up to the officers and asked them if they could teach me how to tie a tie :)
After demonstrating it 2 times i could do it :D
i high fived the cops and they left....
ever since that evening i know how to tie a tie....
I know the double and single windsor, because they're basically the same except you wind around one more time...