Oh, it is. They're both possessive about me, bless their little hearts, but Charlie even more than Sunny because I'm not making him play second fiddle to Sunny (as their previous owners seem to have done).
They understand! And as it turns out, Sunny originally used to be called Charlie -- the dad of their former owner, who was the one to actually hand them over to me, misinformed me and I only found out about the accidental name switch when I (belatedly) received their vaccination info. That said, I would probably have named the black boy Charlie anyway, because he looks a bit like a cat my cousin used to own ... and whom she had baptized Charlie because his "moustache" (the black markings under his nose) reminded her of Charlie Chaplin.
I hope yours are doing well, too!