Pull your arm into your sleeve, drop the strap off each shoulder, reach behind and undo the hooks in the back. Let the straps come off your arms and then pull it out through your sleeve. Bam, you're a magician.
Also I take shirts off from the bottom hem and just yank my it up over my head. I didn't know anyone else did it differently.
I like to think that Ender stopped replying to this thread because he and his girlfriend got caught in a couple of bras and couldn't escape. Is that weird?