More limericks with very strict rules and I'm standing by with a metre stick ;)

I’d love to sail down the Yukon
They sent me a half-price coupon,
Will I be seasick?
I'll bring a picnic
But can I really trust Groupon?

They say, "There's gold in them thar hills"

They say, "There's gold in them thar hills"
But them high places give me the chills

They say, "There's gold in them thar hills"
But them high places give me the chills
So panning for gold

They say, "There's gold in them thar hills"
But them high places give me the chills
So panning for gold
Would make me durn cold

They say, "There's gold in them thar hills"
But them high places give me the chills
So panning for gold
Would make me durn cold
A gold nugget would give me thrills

I really like dangling earrings

I really like dangling earrings
But they tend to throw off my bearings

I really like dangling earrings
But they tend to throw off my bearings
They get in my way

I really like dangling earrings
But they tend to throw off my bearings
They get in my way
When football I play

I really like dangling earrings
But they tend to throw off my bearings
They get in my way
When football I play
I’ll have to tie them up with strings.

My nose-ring’s a hazard as well

My nose-ring’s a hazard as well
Its metal is all I can smell

My nose-ring’s a hazard as well
Its metal is all I can smell
It’s going to my head

My nose-ring's a hazard as well its metal is all I can smell
It's going to my head
Can't take out for bed

My nose-ring's a hazard as well
Its metal is all I can smell
It's going to my head
Can't take out for bed
And sometimes it just hurts like hell

My belly button ring is best

My belly button ring is best
It's covered by my woolly vest

My belly button ring is best
It's covered by my woolly vest
It's real gold you know

My belly button ring is best
It’s covered by my woolly vest
It’s real gold you know
But it has to go

My belly button ring is best
It’s covered by my woolly vest
It’s real gold you know
But it has to go
It looks like I've got a third breast!

Porcupines don't make good pets

Porcupines don't make good pets
And you shouldn't trap them in nets

Porcupines don't make good pets
And you shouldn't trap them in nets
Not good for a cuddle

Porcupines don't make good pets
And you shouldn't trap them in nets
Not good for a cuddle
Easy to muddle

Porcupines don't make good pets
And you shouldn't trap them in nets
Not good for a cuddle
Easy to muddle
And tricky to get to the vets.

But, you know some cats are feisty

But, you know some cats are feisty
Their scratches often turn naisty

But, you know some cats are feisty
Their scratches often turn naisty
They go out at night

But you know some cats are feisty
Their scratches often turn nasty
They go out at night
Ripe for a fight

But you know some cats are feisty
Their scratches often turn naisty
They go out at night
Ripe for a fight
So to get one, you shouldn't be too hasty

Dogs are the best pets by far