when a extremely skinny, tall, lanky, and very pale male subject sweats perfusively during sexual intercourse while believing to be the sexiest being on the planet.
"I couldn't take him serious during sex because he was being such a wet rat."
http://www.urbandictionary.com/define.php?term=wet%20rat
picket fence の象徴するところは…
A picket fence, ideally white, is seen by some as a symbol of the ideal middle-class suburban life, with a family and children, large house and peaceful living. This stems from the fact that houses in quiet, middle-class neighborhoods often have a garden, which then is typically surrounded by a picket fence.
http://en.wikipedia.org/wiki/Picket_fence