"It wouldn't be a thing you couldn't mention--not depending on when you're on my Earth. It depends on if you're in my time, or the past. I already changed it once."

Honestly, he's not sure if he wants to share or not. It's--it would be so nice to have someone to share this with, who gets it. For so long it was him, and Mom, and Master Gohan. And then just him and Mom, and even when he'd been to the past, he had to keep certain things secret.