Beck and call. You're right, but on the other hand, as I said, loving partners indulge one another's fetishes. Almost any relationship can involve belly play if you want it to. Besides, simply having the same fetish doesn't necessarily add anything at all to a sex life.
There are those who indulge in purely sexual relationships; I've never come across this in my life, but I don't think they should worry either as it is such a very easy fetish to cater for. You're not doing anything that a normal person would find disgusting, funny or painful, so you're really not to worry.
You never know what you might find on the internet! But if a relationship is what you want, they'll be happy to indulge your belly fetish and with luck you'll have a wonderful person in your life as well! The internet is wonderful for meeting people of like mind. I have met several good friends and partners, including my wife, on okcupid.com. I'd recommend it.
Credits, ilpalazzo3.