The 32-year-old actor and Jenna are expecting their first child later this year, reported ContactMusic.
"Oh man, I'm not even getting into what I do to pamper Jenna. I'm doing anything that she asks for. She jokes to me all the time by saying, 'If I feel good, then the baby feels good or if I'm happy, then the baby is happy.'
"And I'm like, 'That is such an urban myth. You're just saying that to get me to do everything for you," said Channing.
"I know it's probably true, but I like to joke about it and she hates it. I'll go to the store to pick up shakes or give her 1000 foot rubs. A foot rub now through the nine months if I have to, just to keep her happy and comfortable," he added.
The actor also revealed that he is a bit worried about changing diapers.
"I have never changed a diaper before, so I may need some help learning. I don't have friends who have kids, so it's going to be an interesting experience to learn how to change a diaper."