You have to wonder, what do the summons do when they're not summoned? Do they just go about their lives? In addition to that, why do they always seem battle ready? They're never sleeping, or eating or anything. Why doesn't something like this happen?
Pakun: DAMMIT KAKASHI!!! YOU KNOW BETTER THAN TO SUMMON ME IN JUNE!!! THAT'S MATING SEASON!!!
Kakashi: Sorry Pakun. It's not like you were it the middle of having sex, right?
Pakun: I WAS GOD DAMMIT!!! BY THE TIME I GET BACK, SHE'LL BE BONING SOM OTHER DOG!!! I'LL KILL YOU!!!!
And thus, Kakashi was killed, as was the genin team, leaving Gatou to rule of Wave, after killing Zabuza and Haku.
Pakun: DAMMIT KAKASHI!!! YOU KNOW BETTER THAN TO SUMMON ME IN JUNE!!! THAT'S MATING SEASON!!!
Kakashi: Sorry Pakun. It's not like you were it the middle of having sex, right?
Pakun: I WAS GOD DAMMIT!!! BY THE TIME I GET BACK, SHE'LL BE BONING SOM OTHER DOG!!! I'LL KILL YOU!!!!
And thus, Kakashi was killed, as was the genin team, leaving Gatou to rule of Wave, after killing Zabuza and Haku.