So my cat has started gently biting me after he sniffs my hand. Normally before giving him a behind the ear scratch, I usually let him sniff my hand, gaining tacit permission to carry on with the affection, I'm sure you all know what I mean. Initially I took this bite/pressure as a please stop fussing me, but he's not reacting to my ds stroking him 5 minutes later. So I'm most bemused. It's not breaking the skin, but this is completely new behaviour. He is 12ish. Anyone got any ideas? He's not a lap cat but does love a good stroke and a bit of chin/ear rubbing normally. He seems perfectly healthy otherwise.