A/N: Hey there! So, this is another continuation of the first one-shot. Yeah. I'll basically just be posting as I complete them, so updates might be irregular.
Also, I know the invisible head-helmet thing has been done. A lot. But, not by me, so I don't care so much. Just know that it's not an original idea.
Thanks to all who reviewed the first one, it was pretty awesome!
Oh, and I forgot this the first time: I do not own Phineas and Ferb.
A Collection of Common Nonsense
Reasoning
Ferb had always been the observant one. His quiet nature simply allowed him the ability to watch people more closely and in return to be able to understand them a bit better. It came in handy when he wanted to lord secrets over Phineas (such as Isabella's supposedly secret admiration for his brother), and when it really counted in life-or-death situations.
So, when he heard about the Amnesia-Inator, he had quickly nudged Phineas and the two boys had put on their invisible head-helmet systems, hoping for the best.
His hunch had turned out to be right, for the boys had emerged from the Amnesia-Inator with every single memory intact.
And yet the boys didn't tell Perry.
Ferb understood their reasons. Who would want their beloved pet and family member to leave forever, all because they had been careless and had blown his cover?
For, as he had said before, "Well, we've had a lot of great days, but we've only got one Perry."