Hey! All those things work under an intelligent design argument, as long as you believe God is a little bit forgetful and indecisive.

"Oh, should the whale be in the water or on land? Water or land? Umm... let's say water!! ...oh crap, I forgot to take the legs off!! Dammit!! Oh well, hopefully no one will notice."

"Now... should the males lactate? Hmm..."