When you pick your nose...

[KillerGremlin]

And don't even try to deny it:

Nose-picking is an extremely common habit, with some surveys indicating that it is almost universal, with people picking their nose an average of about four times a day.[2] A 1995 study into nose picking, requesting information from 1,000 randomly selected adults, gathered 254 respondents. It defined nose-picking as "the insertion of a finger (or other object) into the nose with the intention of removing dried nasal secretions". Of those who responded, 91% said they were current nose pickers (but only 75% of these believed everyone did it) and two people claimed to spend between fifteen to thirty minutes and one to two hours a day picking their nose.[3]

https://secure.wikimedia.org/wikiped...i/Nose-picking