People are chimp/pig hybrids. Back when the genetic common ancestors split, just when they were still able to create a viable offspring, the two created the Human genetic line.

We have just as much, if not more in common with the pig's phenotype.

I can't take total credit for the theory. One day I thought of it and google it and found this already existed: http://www.macroevolution.net/human-origins.html