Weddit
There isn't a single person in it.
Get divorced.
Peas and franks.
Frank
Because opposites attract. (Told to me by 2 students today, loved it!)
A polynomeal
Nah I'ma stay
Asking for a friend
They prefer cash.
It's sterile and he likes the taste.
In werehouses.
Well, the flag's a big plus
Cacawatches
If it's a good one you will be able to talk about it later!
Re-arranged marriage
A Brexit
They both form a bond in seconds, last (ideally) forever, and are dissolved by alcohol.
Because you end up with a ring on your finger.