Every 10,000 miles of driving or so, you get to see something like this

Indeed. Mammatus, from the Latin mamma, meaning breast...
.
That's right. Boob clouds.

Do you think, maybe...
http://dashie.mylittlefacewhen.com/media/f/thumb/mlfw7701.gif

Wait wait! So we call our mothers "boobs!
(In Holland we do)

*?!