I'm not sure how much help a dick description would be for police searching for a criminal, but it does make for great internet. Distractify rounded up a bunch of women and had them describe their boyfriends' dongs to a police sketch artist, because really, you never know when you're going to need a drawing of your significant other's junk.
Check out some of the descriptions:
"It's like a can of beans."
"It like, changes color."
"It's like that net that catches basketballs."
"I would give it a little bit bigger mushroom with even maybe a smiley face."