Not loving the solids

So, something weird has happened over the past week and I'm not exactly sure of the cause. Cole has started to spit out his solid food.

Here are two possible causes I am considering:
a) He got used to nursing more when he was sick
b) Another tooth (called the Lateral Incisor) has come in next to the one Central Incisor that recently came in.
c) He inherited my finicky ways

I think it's maybe a combination of a and b, but who the hell knows. All I know is Cole wants to nurse more and eat less solids. It's very much hit and miss these past few days. We tried feeding him solid food three times Sunday. They were all food we made and food that he's eaten gleefully before. He didn't want anything to do with any of them. What he does is push the food out with his teeth as he makes his scrunched up "unhappy" face. Have you seen that face yet? I MUST post a picture (see below). It's too damn cute. So back to the story. He made the face and after a few tries with this, he was all  "Waah Waah Waah" -or roughly translated: "boob, boob, boob." And I was all "Try what's on the spoon first!" But no.  Eventually he just turned his head and thrashed his legs. He wasn't feeling it. However, the night before last, I fed him potatoes and he gobbled it right up. And the potatoes were lumpier than anything we've given him in a while. So, like I said before, who the hell knows?

Who can make the better scrunched up face,
Mommy or Cole?

But if YOU know or have any idea what I could do to help him be on better speaking terms with his solid food, I'd so appreciate it.

Cole gives Daddy the scrunched up face.