Even though Foxy tried his best to not laugh, he couldn't help it, his paws were very sensitive. It got to the point where with two hands tickling two separate paws, he was begging for it to stop. But of course you didn't, it was too much fun, plus he had soft smooth paws so they were irresistible to not stop touching. Which probably explains why you kept tickling him for hours. ;)

Credit goes to their respective owners.