Yep, I'm going to gross you all out by discussing boogers, more specifically Eligh's boogers.
When Eligh has a cold he shoots boogers out of his nose and runs to tell you he has "boogers."
Our response is always, "Go get a tissue!!!"
No matter if he has a cold or not, he also always has the biggest, crunchiest boogers that require me to retrieve them. Yes, I pick my son's nose. Lately, though, as I'm amazed at the size of these boogers I'm retrieving I have asked him where these boogers come from.
His response (well over the last three times) is, "Daddy puts them in there." (Do not try to convince him otherwise or he gets c-r-a-n-k-y.)
So, you may want to investigate to see who has been putting boogers into your children's noses, because it may be enlightening.