I've just created a page for ALSO THAT on teepublic.com, where you can buy some shirts to keep everyone from seeing your nipples! Click the link or hit up the STUFF section of the menu bar.
I've got four different designs up right now. You can get them in a variety of colors and styles. Tank tops even, for those of you who hate sleeves.
Just in time for Christmas, they're on sale for the next three days, so you should buy one now at a discount.
Seriously, buy one. It's cold out and you should really put a shirt on.