Title: Birds and bees
When Kakashi turns 14, Minato-sensei tells him they need to talk about something now he was old enough. During 10 minutes, Minato open his mouth to start the conversation then closes it while steadily turning redder and redder before finally fainting (his mind couldn't reconcile little Kakashi whom he practically raised and telling him about sex). Kakashi observes his drama queen sensei in quiet amusement then uncovered his sharingan eye to record that priceless moment.
In the second tentative, Minato manage to start talking: "so… you're a teenager… soon, you'll hit puberty… …" a longer pause while his face turned horrified and then he used his Flying Thunder God Technique to collect the longest border surveillance mission available. Kakashi smirked disturbingly at every shinobi who ask him why his sensei did that.
Finally, when Minato return to Konoha, he was ambushed by Kushina who promptly tied and gag him with her chakra chains, carried him to their apartment, sat him in face with Kakashi and started to give her version of the sex talk. To an appalled Minato, it contains many absolutely non-redacted references of their own sex life.
The reactions after that went like this:
Minato / Kakashi
"Why did you wait until I came back to give that talk if I wasn't allow to participate?" "Obviously, because it's more funny that way, sensei."
"Did you have to mention Jiraiya-sensei's books?!" "Can I borrow your collection, sensei?"
"Why did you mentioned the henge experiment?!" "Well, at least, I now know that she talked about male body knowingly. Although I'm now really regretting that my chakra reserves don't allow me to form a solid henge…"
Kushina just laughed at them and went to bed feeling like she did a good duty.
-K&M-
Author's note: Recording happy moments with sharingan is inspired by A political perspective by MueraRashaye on Archiveofourown.