Assigning Blame For My Son's Sayings

Saying #1: Junk
Culprit: Buggy
Blame: Me
Rate of Saying: Everytime he and his brother fight, or he comes in contact with anyone for contact play purposes.

Unfortunately, it happened once when he headbutted his brother below the belt. My initial reaction was simultaneously trying to hold the laughter back (lets face it, hits to the groin are always funny unless it happens to you) and feeling sympathy. but when I opened my mouth the only thing that emerged was the admonishing statement of telling Buggy "Don't hit your brother in the junk."
And ever since then, the concept of hitting one in the junk, replays in his head over and over again. If he crawls onto my leg to latch onto me, any movement and I hear him state so eloquently, "Oh, Dad, you just hit me in the junk!"
He's overly dramatic, and I believe is actually looking for excuses to just say the word "junk" in reference to his groin. This is of course the boy who would stand outside on the sidewalk, and in an awkward attempt to amuse his father, and punch himself down there and then laugh....repeated several times, because apparently his activity overrides my authority to tell him to stop doing that.

Saying #2: Nipples
Culprit: Buggy
Blame: I HAVE NO IDEA!!! (seriously)

The other evening, prior to supper, Buggy and Josh are wrestling. Josh was getting hot, so he goes to take off his sweatshirt. Buggy, in mirrored emulation starts to take off his single t-shirt, and loudly and boldly proclaims, "OHHHH, So you want to show off our little nipples, huh?!"
He has mentioned his nipples in the past, and continues to occasionally mention them still- again, despite efforts of both myself and his mother to tell him to quit talking like that. And again, his "fun with vocabulary" is still overriding any parental authority.

Saying #3: Payback
Culprit: Buggy (yes again, its always him)
Blame: again, I have no idea where it came from, although this one saying I'm okay with him using.

Everytime Josh gets the better of Buggy when wrestling, or takes the kind of random cheap shot out of nowhere, like siblings do from time to time, Bug is insistent on paying it back. I've heard the statements come forth in various forms:

1. "Oh that's IT, Josh. You're going to get the payback now!"
2. (When Josh is still in wrestling mode and Buggy can't get the upperhand) "You're
NOT playing fair Josh...you need to come here and turn around so you can get your payback!"
3. "Dad, Josh wont let me give him his payback!!!"
4. (as he and Josh are in the middle of grappling, and it looks more like a bear hugging anywhere on the body contest) "You're gonna get it, you're getting payback! I'm gonna give you the payback you deserve!"
5. "But Dad, after I was going to choke him out, he flipped me and stepped on my arm. He needs Payback!"

Saying: For no reason...
Culprit: Buggy
Blame: I think this preface for any excuse is biologically rooted into the DNA of every kid. Kind of like the answer of "I don't know" whenever asked why they did something.

This particular saying is usually accompanied with my cat, The Esteemed Colonel Beauregard Sterling Lovell, having peeled back ears, wild eyes, and a twitching tail. He gets a little worked up sometimes. And usually right about the time I here the words "for no reason" I also see the Colonel lunging at Buggy and try to dig claws into his torso and eat him.

The cat goes through severe mood swings....sleeping and full on Pscyho Killer Kitty. If Buggy is running through the house, and the cat is in one of his moods, he may well get chased by the cat as he streaks on by. Of course Buggy is encouraged by this, and baits the cat into doing this two or three more times. If the Colonel becomes bored, he does what cats do best: Make it quite clear they aren't going to even bother feigning interest. But then what does Buggy do in return for the snub? He goes up and starts patting the Colonel on the head, or back, or pet his belly. This is a very dangerous maneuver during the Colonel's wild moments of the day. But, since I do it, you know, to TRAIN the attack kitty, apparently buggy thinks he's as much or more of a man than me, so he can do it too. But then the Colonel leaps at Buggy and tries to eat him. Then those words, "Colonel is trying to attack me FOR NO REASON", and thats when it happens. Unfortunately, I never have a video camera ready to go, because it is quite the humorous sight to see.