muffruff, I suppose, from your post, that he may have been someone's pet and that they used to rub his tummy. Any truly feral cat will not allow a person to touch them. I know that some cats will play rough when anyone rubs their tummy, and other will simply lay back and enjoy it. That it all depends on the character of the cat. Personally, I'd recommend that the next time he flops over for you to rub his tummy, that you get a pair of gloves on and proceed with the tummy rubs. If he gets too rough then you are reasonably protected. If , on the other hand, he becomes not as rough as you might have expected, then I would rub his tummy until he wants you to stop. Then there is hope to rescue him from the streets and make a house pet of him.

..............wayne