I'm looking for a story/caption series I found a few years ago and lost. Basicly a man and a woman are forced into an ab situation by what I think was a giantess if I recall correctly. The man is a boy baby and the woman is a girl baby, I seem to remember they shared a crib and the man would have fun with the woman at night. Later in the story the giantess says a new study shows that girls are happier and forces the man to get a sex change. A little later she says that a new study shows that the first was wrong and boys are happier so she gets the woman a sex change. After this the former woman then has fun with the former man at night.