My older cat, Spike started grooming Sparky when he was just a baby. We used th think it was really precious and that they were bonding, but as Sparky has grown older, Spike will hold him down and groom him and Sparky will try and wiggle away. sometimes Sparky will sneak up on Spike and try to do the same (pin him down and groom him) there will be a struggle, and Spike usually winds up grooming Sparky... so i'm wondering.... is it a social thing? are they bonding? is it a dominance thing? is Spike asserting himself as the dominant cat? or are they just being crazy cats?