I found a bunch of stuff on it awhile back, which was productive, but it got away from me. Give me a day to find it, and I will get it to you.
There are actual classes you can take it. It's a graded class (meaning there are different levels of the knots), which is pretty interesting, if you like to meditate on how to rig knots.
Here's the thread that got me started. Its off topic for sex, but I was trying to figure out how to tie the knot they tied.
I will keep trying to find some of what I found before because it was a bit better, if I remember correctly. But those are good sample sites.
BTW, it IS kind of a specialty, and it IS a fun one, if you can get into it. You dont look like you'd be at a loss for a partner, but the classes would be kind of fun to take because you can buddy up.
If you need a study buddy, I'm a bit older, but you can practice on me (at least in VT)!