"Ugh. Somethin' really stinks in here... Jiraiya-sensei didn't try to rig up the plumbing again did he?" Yahiko asked as entered the room, the deep mental scarring still remaining after Jiraiya's last DIY escapade.
"Oh, no, he's out on a mission..." Nagato replied, shaking his head."...That's just Konan..."
"Nagato don't be so mean! She doesn't smell that bad!" It was extremely abnormal for Nagato to have a bad word to say about anyone. Probably because, in Yahiko's mind, he was terrified that if he ever did, they would chase him down the street trying to hit him with a 12ft metal pole.
"No, I mean... It's Konan cooking..." he replied with a certain degree of nervousness that really didn't do anything to correct Yahiko's mental picture of him.
"WHAT? Why'd you let her do that!" If there was anything in the world that – over that past few months – had embedded deeper mental scars in Yahiko than Jiraiya's failed attempts at home improvement, it was Konan's cooking. "You know everythin' she cooks tastes like the smell of an old person's kitchen!"
"Yes but... I didn't want to tell her that and hurt he feelings..." However, after that night Nagato found himself being violently ill and concluded that next time, it would be better just to act like Yahiko, to prevent Konan doing further damage.