Yes, I have seen it before. In fact, it is not all that uncommon for a neutered male cat to play wetnurse to kittens!

Your story reminds me of Toot (rainbow bridge). When we first adopted him, he used to try to suckle off Zebo, my grown, neutered, fat male. Zebo would never let him, though. One day, I noticed Toot was purring loudly, kneading his paws, and peering at something interesting. I followed his gaze, and noticed he was looking at my son's bare chest!

[This message has been edited by 4 feline house (edited May 02, 2001).]