Guardians of the Galaxy: a theory

Last night my in-laws were visiting, and they very kindly looked after the offspring so that my husband and I could go see Guardians of the Galaxy (second time seeing it for each of us, but first time seeing it together).

Anyway, it was fun, and Rocket and Groot still stole the show the second time around, but what I want to post about is the awesome and CLEARLY DEFINITELY TRUE hypothesis that Mr. Shadowscast and I came up with afterwards.

( Regarding the identity of Peter Quill's biological father... )