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1.
Also refereed to as "wet patches" or "sweat patches", Exclamation Marks are the shape of sweat patches that ladies usually leave on a plastic chair or a rubber floor when sitting for an extended amount of time. This is because the heat extracted from the leg skin and inner crack gets trapped and sits between the end of the crack and the middle of the upper thighs - since the thighs are almost placed together just leaving a bit of room. This leaves a mark of sweat on the chair in the shape of an exclamation mark because it is conveying the shape of the ladies crack, upper thighs and lower ass. Some ladies are seen sliding off their chairs instead of getting up straight away in order to wipe away the exclamation mark before anyone else (preferably the boyfriend) sees.

Another reason for this is that when girls are with their boyfriends they get nervous and start to sweat on their upper thighs, therefore leaving a mark in the shape of an exclamation mark.
Example One:
Girl one: Holy crap I was so nervous when Jim took me out to dinner, and because I was so nervous I left a massive exclamation mark on the chair! I sure hope he didn't notice.

Girl two: I know what you mean, I hate plastic chairs because I'm always leaving exclamation marks on them! Why can't these places just buy normal chairs with Cotton Covers, that would help out so much because there are so many girls who have to deal with this problem!

Example two:
(On a sign at a fancy restaurant)
Lady members visiting the restaurant are reminded to place towels on the chairs before sitting down, in order to avoid leaving Exclamation Marks.

Thank you.

Have a nice day.

Signed: The Committee.
by WhatsherfaceBBQ July 13, 2009