While I often get the impression that most of my cats think of me as a
big boob, none have actually gone so far as to try to prove it.

We had an Abyssinian like that once, and we knew from the breeder
he had been taken from his mother a bit on the early side. He grew
out of the specific earlobe thing after about two years, but remained
very oral to the end of his days.

--
Jerry Kohl <jeromekohl@comcast.net>
"Légpárnás hajóm tele van angolnákkal."

I had two fosters (now permanent) that did that, I figured it made them
secure so may as well let them do it.  (They were orphaned at young ages so
didn't really get a chance to satisfy that urge).  They are both 8 months
old and are pretty much through with sucking on earlobes, although every
once in a while they still do.  Try having to sucking on your ears at a
time - gets awful warm!

I've got a norwegian forrest cat  too who likes to suckle erlobes or mostly
the left at the moment :-)  If  we try to move him to the other side he gets
a little annoyed and tries to go back to the left side.  He does this every
day when we come back from work.    I still treasure this moment even if i
my earlobe suffers a little :-)
He too was taken a bit early from his mom , so I think this behavior will
pass when he gets older.
He never sits on my lap ,but is quite affectionate in other ways.
I love that he gives me a little spesial mjau when I stroke him and there
are all these small think that he do that gives me a richer life.
Like that I get a really fuzzy feeling when I see him strech his whole
length in content and for a moment think I see him smile. And when I see him
chase the bigger cat next door :-) , and the way he looks at me ,squinting
his eyes when i tell him how good a cat he is , and  just the way he poses
sometimes .
All these things gives me more than the time he spends licking my earlobe ,
so I will never see a problem if he stops doing that at one point :-)