ok... finally figured it out.... what bugs me about the Girly's look.
The tank looks melted. Like the sides sagged down.. you know when grandma's cheeks begin to sag on the sides?
(http://4.bp.blogspot.com/_Qp3vka9bQAM/St1MCCcw5YI/AAAAAAAAAG8/tIoUL8NBBRw/s400/Old+Lady.jpg) :D