A daddy blogger admitting he favors one child over the other. And it's stirring up a lot of controversy. Take a look. Why do you go to jan all the time? Reporter: Sibling rivalry has long been... See More
A daddy blogger admitting he favors one child over the other. And it's stirring up a lot of controversy. Take a look. Why do you go to jan all the time? Reporter: Sibling rivalry has long been lampooned in classic tv shows like "the brady bunch." But what happens when a parent says he likes one child more than the other. A father has done just that. Writing a blog saying he favors one son over the other. In the post, he said, I i were to be absolutely honest, my older son is my favorite of the two. He and aare adventurous partners in crime. And I can't imagine life without him. Bishop admits in a follow-up post, to me, he's more fun. I don't love either of my sons more than the other. But I do like them differently. I'd be willing to bet you're the same. He posted this video, saying it pinpoints the exact moment he fell in love with 5-year-old zacharie, then-2. For me to take that language and call him my favorite, he's just the one I relate to easier. And if that means he's my favorite, and those are the -- that's the language, I don't think that's too evil. There's a maturity factor you hope that all fathers have. And that goes beyond the line. Reporter: Online, the reaction was swift and brutal. That favorite kid thing can go a long way. But some people understand where bishop's coming from. There is some truth to what he says, I think all parents sort of favor one. Reporter: Child psychologist, dr. Jamie howard, says outward displays of favoritism could have ramifications as they grow. It could be more difficult for kids if they got this notion that they're not as likable. Reporter: But bishop stands by his blog post. It's something we have inside. I'm honest when I write. I wrote about that moment and the struggle I have. And told the story about my kid.
This transcript has been automatically generated and may not be 100% accurate.