THREE IS THE PERFECT NUMBER!!!

[im teh gay man]

my dog ate my sanity

Also works with 1, 3, 5, 7, 9, 11, 15, 19 etc.

But no one expects 17. All the other numbers they catch on.  

[my dog ate my sanity]

And 17 doesn't? Think about it, it's the number right after 16, and before 18, it's not inconspicuous at all. If you want inconspicuous you need a butterfly. Nobody ever suspects the butterfly.  

[Namine of Hearts]

sbluestar

13 is where it's at. Especially when it falls on a Friday...

yea 13 =D (it also can be a B XD )  

[my dog ate my sanity]

1 is the loneliest number that you'll ever dooooo,
2 can be as bad as one, cos it's the lonliest number since the number one...