A perfect example of "The only dumb question is the one you don't ask."
Everyone here did not know the answer to just about any question at some point. Just give a little effort to find out and when you can't just ask.
I just read the post and want to assure all I am not being snarkey. If you search for B&M you will probably find thousands of posts that use it and you would have to be very lucky to find one that explained it. On the other hand if your kayfun leaks there are lots of threads that are easy to find talking about leaking kayfuns.