We happen to know that Colton Haynes' birthday is in July, so we're not sure why this birthday greeting from his former Teen Wolf co-star Tyler Hoechlin is surfacing now.

But given that Hoechlin calls Haynes a "master" piece of ass and a sexy son-of-a-bitch in it, we're not really that concerned.

The candid clip was posted by Derek Halliwell, a.k.a. "FeelsForSterek," who clearly pines for a Derek and Stiles relationship.

We feel that, but maybe a Derek and Jackson ship would be more appropriate?

The guys of Teen Wolf seem to have developed a strong bond, even among those who have left the show. Haynes recently revealed he struggles with severe anxiety.