You shouldn't have to. If you've started out and did a clarifying wash to get rid of product buildup/silicones and followed with a DT and CG friendly items, you should be fine. I think weekly DTs are the norm unless your hair is super dry. If that's the case, then a heavier rinse out condish should to the trick.
2 b/c :: slight protein sensitivity :: med/coarse texture :: normal porosity