Poor you and poor Luna. I take it it's the first time? I use the same for Fister, also on the neck, but only 2 drops. I smear it out on his neck and then what I have left on my fingers goes above his tale. He will immediately try to lick it off, but since the smell is also by his tale, he goes for that area - but of course, there's hardly anything there. I usually does it when he's resting in the windowsill and he doesn't seem to connect it with me.

I hope Luna will have forgiven you tomorrow!