What do you think about belly button cuckold?

I don't know how common is this, although I remember some posts here about this, so I just want to know how many of you are into belly button cuckold. I recently confessed to myself that I have some cuckold fanatsies, and I'm seriously considering to get my next gf know about this fantasies. Definetly I would like to try this sometimes. What are you thoughts about this? Have you tried some kind of belly button cuckold already?