Linking to your mainstream sites from your adult sites. Good idea?

[Pagan]

Hmmm.. I have actually done this for a good number of years. I borrowed an idea from Greenie, and have sent all of my exit traffic to my joke website instead of google or disney. There is an mature humor section, so it isn't really so out of line. That site has a PR of 7 these days while my adult sites creep along at 2. Granted, it is only one single outbound link from just the index page of free sites.