A minor heart attack

Back from work, was watching a Discovery Channel program, while wifey was removing my leg bandage(from my bike accident), seated near my foot. I think the program was called Hunters. Anyway at one point it was showing wild dogs fighting with a Rhino. 

My son Ayaan 11 years old, who was supposedly studying for his final exam with his sister in their room, drifted out casually (Terrible hunger and thirst usually strikes whenever they are supposed to be studying & we happen to be watching TV) , stood just out of sight behind the corner wall, watching the TV show. 
He informs me in a matter of fact voice, "Those are called DILDOS", and calmly continues on his way to the kitchen. 

His mother who was seated on a stool, facing me with her back turned to the TV, concentrating on removing my knee bandage, freezes, eyes widening and looking at my face. 
I have had these crazy statement moments before, at home as well as with my team. So, I don't display any obvious reaction. But inside my head, my brain is frying itself, running at Super computer speed trying to make sense of the scenario. 
Where did he get this word? How did he learn this word? I am not watching anything remotely indecent, then WTF is he talking about? Has he been watching things on the computer or phone? But I did put a parental filter on the WiFi. Isn't it working? 

Then, as usual a little late, my brain makes the connection. I call out to him in the kitchen, "Ayaan, the name is DINGOS! The wild dogs of Australia are called DINGOS. These are African wild dogs."

"OH! OK." he replies as he drifts calmly out of the kitchen, returning to his room, chewing on something, unaware of the Nervous Bomb he just detonated. 
My wife and I exchange glances of relief.