How Do They fit the CMB Into those Little Ovens?

[Anomalocaris]

Because the intensity of the CMB radiation is extremely week.  As a person of average size, your total skin surface area would absorb CMB from the universe all around you at about millionth of one watt continuously.   That’s about one hundred thousand times less than what your cell phone will expose you to if you hold one next to your head, and one ten billionth the power a chicken breast absorbs when you turn your microwave oven to high.

So you will absorb less energy from the CMB over your entire body during your entire lifetime, than a frozen chicken breast will absorb in just one second from a microwave set on high.