They Paid Good Rocks For Those Eggs

Gay Penguins Steal Eggs From Straight Couples says the story.
The two penguins have started placing stones at the feet of parents before waddling away with their eggs, in a bid to hide their theft.
So it's not theft, it's a surrogacy program.

Read the rest of the story and it's hard to say who's more ridiculous: the birds or the people excited over them. For example, the zoo-keeper feels he has to defend the decision to isolate the egg-stealers from the other birds.
It's not discrimination. We have to fence them separately, otherwise the whole group will be disturbed during hatching time," he added.