My theory is he figures he's looking at some time so he got off gear to get on 'legit' TRT so he can get it administered in prison. Otherwise he's sitting there with zero test due to having been 'on' for so long and that's obviously less than ideal. ESFitness has told about how he got his 200mg shot every 2 weeks when inside. I think Wes is actually right about how it's kind of weak to be dependent on an image or feeling, I know it well myself, but I doubt this is his reason here.