That's what I've noticed too! All of my buns get a pretty similar diet, yet some groom me while others expect to be groomed by me. I used to buy salt licks, but they got ignored by the rabbits...I have two buns that have the same diet and one just doesn’t like to lick me but the other loves to give kisses, so if your rabbit has a good diet and is healthy then all those licks theyre giving you is most likely kisses!
Theo eats dirt too! I don't know why, I feed him plentyOther deficites, I don't know, sometimes one of the outdoor rabbits starts to eat plaster from the wall, or dry dirt from the ground, no idea why.