Matt Damon Faxed His Butt to Ben Affleck and Jimmy Kimmel - PHOTO

Credit: Getty Images

Matt Damon faxed his bare behind to Ben Affleck and Jimmy Kimmel for mocking his lack of a Twitter and it's all for a good cause.

It all started when Affleck thanked late night host and Damon's mortal enemy (no, really) Jimmy Kimmel for retweeting a link to win a date with Matt and Ben, while simultaneously supporting their charities the Eastern Congo Initiative and Water.org.

All while mocking Damon for not having a Twitter.

https://twitter.com/BenAffleck/status/434156940420452352

Twitter CEO Dick Costolo even got in on the fun, writing:

https://twitter.com/dickc/status/434209681544736768

Which prompted Damon to respond. Albeit via page and fax which Jimmy Kimmel delightfully shared.

https://twitter.com/Water/status/434483686679904256

https://twitter.com/jimmykimmel/status/434513074511286273

https://twitter.com/jimmykimmel/status/434746764529135617

The entire feud was eventually settled by Ben Affleck, by reminding people why they should donate in the first place.

https://twitter.com/BenAffleck/status/434815448031707137

WATCH: Matt Damon and Ben Affleck Insult Each Other for Charity