I want to build a sex swing and I figure it can't be that hard. Here is what I want to do:

I have a really stable pull-up bar. I am thinking there has got to be something I can connect to it.

I would need something that grabs the pull-up bar so that it doesn't slide around. Also, I need something like chain or something else strong to go from the pull-up bar to "bed" of the swing. Then I need to find something for the bed. Some kind of 4'x3' with metal O slots in the corner to attach it to the chains.

Does anyone have any ideas?