Dr. Pizza Convicted

https://nationalfile.com/left-wing-ars-technica-journalist-drpizza-convicted-of-pedophilia-offense/

This got me thinking: "Bright was arrested by the FBI after a back-and-forth with an FBI agent posing as a mother of a 7-year-old girl and 9-year-old boy on Kinkd. He allegedly sent the agent, posing as a depraved mother, a picture of his penis and records proving that he was STD-free."

D.I.D. is only possible to develop in a child between the age of 7-9. I know the 'mother' was an agent, but is there a reason why they used those ages? Just bugged me… D.I.D. and MKultra go hand in glove.