"White rabbits, white rabbits, white rabbits" is apparently something British people say on the first of every month to ensure good luck. I don't understand it, but I don't have to - I have received good luck just by viewing this tweet, so he can say absolutely whatever he wants.
There appears to be absolutely no context for this photo besides the fact that Luke Evans is working out. He just felt like showing off what is a very impressive bulge, and I can't blame him - if you got it, flaunt it.
I, of course, am not the only appreciative person. Twitter freaked the fuck out:
Same, Dharmen, same.