Both Grom and I are dealing with allergies right now. Don't know what causes them but we both have runny noses and sore throats.
Before bedtime I was giving him a dose of benadryl for his runny nose when he said something about his sore throat. I should've known his throat was hurting, he's been running around the house sounding like an 80 year old man.
I told him to stay still and I'd be back with some tylenol (it really helps me).
When I got back he told me with all seriousness, "Allergies don't make throats sore"
Playing along I asked what did.
"Swallowing swords and knives"
That explains it!