Because it's Adorable
I think Papyton is one of the cutest ships in Undertale lol

I mean, a skeleton and a robot. How is that not cute lolol

Because it's Hot
Bildip.
Human Bill Cipher is quite sexy, if I do say so myself ( omg, what did I write xD )
So, yeah

Because it's Plausible
Bubbline was canon, so it's possible that they get back together X3

Because they're Alike
Yuri ice stakes, Viktor ice stakes
Pretty self explanatory

Because they're Opposites
Jumin likes cats
Zen hates cats

Also self explanatory

Because it's Canon
SOLANGELO IS SO FLIPPING ADORABLE OKAY.

Because of Subtext
Marinette x Adrian is pretty much canon
They just don't know it yet ;3

Because of Fanwork
I never shipped Soriel until I saw all the cute art and stuff X3

BECAUSE I CAN
DRARRY IS AMAZING OKAY
DEAL WITH IT

And if you want to do this -