I’ll go with Jap Anus Relations.
Maybe this is the reason I get along so well with my junior high age grandson. Beneath the middle-aged grandma exterior, I’m really a 12 year old boy. 
I thought the true test of maturity was the ability to hear the Lone Ranger song without thinking of William Tell?
:)
A stop sign near the local middle school was vandalized by a rather uncreative hooligan with a white paint pen to read "Don't Stop" by adding a "Don't" above the "Stop". I took it upon myself to improve the sign with my own white paint pen to read "Don't Stop Believing". Much better.
There’s a residential street on Hatteras Island called Bartlick street adjacent to where a buddy of mine’s family had a place near the beach.
Upon commencing drunken revelry, we decided a little duct tape would cover part of the “B” to change it to an “F”.
We still laugh about that. And we were in our late 20’s/early 30’s when we did it.
That’s what I saw. I still think I’m too mature to giggle over it. What’s wrong with me?
Well remember when you were a small child and your parents told you not to make faces or else it’ll “stick” that way? Well apparently yours got stuck in a frowny face and now you can’t have any fun. 
How 'bout we post our real ages, too (or thereabouts for people who are a bit self conscious).
Anyways, I’m 24, and I didn’t get it. I’d figured “cass” was some sort of sexual term I’d never heard of. But, then again, I didn’t get that Malaysian Burger King ad, either
Yep, I’m a 37 year old woman with the maturity level of a 13 year old boy. 
I Just had visions of anal sex with Mama Cass.
I chuckled. Does that count?
I was cut off recently by a driver whose number plate prefix was ANI. I wish I’d have been able to catch up with him to let him know his car told the world he (and his passengers) were arseholes. I don’t think he’d have got it.
I passed this little maturity test, but a few years back I laughed so hard I had to sit down on the sidewalk when I passed a church with a sign saying something like “ENTER IN THE REAR”. I might claim that I’ve matured a lot in the years that have passed, but I’m chuckling a bit just typing this so I don’t think so. 
The OP in NOT imature. If he were, he would have taken a green marker and colored in the C’s.
Bart Simpson does not approve.
I still have a digital photo somewhere in my PC of a motel near my home that had unfortunately lost one of the letters from it’s marquee reading:
HEATED POO
Could have been worse… could have lost the “H” too.
How do you think I remember how to spell it?
Let’s not leave out Ape Tit.
I must be mature because I didn’t laugh.
However, every time I drive past the sign for a road near my home I think of the Dope. The street: Glascock.
I think I’ve read one too many “maturity test” threads over the years.