I have come to the conclusion that cats will byte out of affection.

I was laying down, and rubbing Ruprechts neck, and outlining his shoulders
with my fingertips, you know...he was drueling...lol...

While I was continuing the same general non-chalant affection, around
hisneck and shoulders...
he bit me real hard and wouldnt turn loose. I said...woah..he looked at me
with my hand in his mouth.

He finally let up...but I believe with all my heart, this was his way of
affecting me, in his own way.

A woman told the same story, she said, her cat would bite her but only after
she stirred him up through affection...(that cat bit the face, so, he needed
some training)...however, this is not a sign of agression from the cat.

My hand was bleeding...I smeared the blood across my palm, and offered it to
Ruprecht, he came over and smelled the blood..I said...quietly...Ow, ow, I
didnt' want to send the message "no", I felt like this would tell him do not
show your affection, rather, don't bite me so hard I bleed please.