It only allows 140 characters
Because they contain a lot of fowl language.
The government is opposed to euthanasia.
You love your own, but hate everyone else's.
I hate to be the bearer of bad news, but the results are a bit grizzly.
Twitter only allows 140 characters.
Because twitter has an 140 character limit.
With Twitter you only get 140 characters.
There's 140 characters, and they are all terrible.