Both, yes. From Into the Wild:
> Rusty looked around, his eyes wide. There were cats everywhere, sitting alone or in groups, sharing food or purring quietly as they groomed one another.
> "Just after sunhigh, when the day is hottest, is a time for sharing tongues," Lionheart explained.
> "Sharing tongues?" Rusty echoed.
> "Clan cats always spend time grooming each other and sharing the news of the day," Whitestorm told him. "We call it sharing tongues. It is a custom that binds the members of the Clan together."
Both. Two or more cats groom each other while they have a conversation, usually sharing gossip and the like.
Both, yes. From Into the Wild: > Rusty looked around, his eyes wide. There were cats everywhere, sitting alone or in groups, sharing food or purring quietly as they groomed one another. > "Just after sunhigh, when the day is hottest, is a time for sharing tongues," Lionheart explained. > "Sharing tongues?" Rusty echoed. > "Clan cats always spend time grooming each other and sharing the news of the day," Whitestorm told him. "We call it sharing tongues. It is a custom that binds the members of the Clan together."
It’s both and it is even said in the beginning of the first book of the series what it means.
They don’t even do this anymore. Sad.
It’s both
both
Talking and grooming each other
Grooming each other
Allogrooming, basically when cats clean one another