There's a fairly active, although I don't know how large group of feeder/feedees. It's a very controversial subject even within the BBW community. You can find a lot of feeder/feedee groups on Yahoo. Some people find it disgusting others find it a major turn-on. There's one website called "Gaining Goddess" Where she's on a long term gaining regimen. There's also Dimensions Magazine which can be found online, which is all about the feeder/feedee lifestyle. It may not be "Gag Factor" but it's just as kinky.