I bet a dozen or so people pointed out the problems with this shirt and poked fun, but beyond random people poking your chest, this shirt is definitely amusing.

http://www.thinkgeek.com/tshirts/generic/ac0b/?cpg=78T

And just a cool shirt: http://www.thinkgeek.com/tshirts/ladies/ad8f/

Gotta love thinkgeek.com.