This is true. I forget what canon point you're bringing him in at. I know at one point he half starves himself and avoids feeding on people. Would he do that in Pines when he found out? Only cuz I see Justine's attitude shifting some to try and get him to feed on her more. Not that she doesn't love the sex, totally does, but she's more concerned with Thomas's well being. Since there is all that love stuff.