In terms of the "muscle worship", something that would be good would be emphasizing certain areas of him, such as his chest, his wide back, his biceps, or his thighs. Things that are both sources of strength and show off his refinement of his body. Maybe lean into praising such a "divine" body.
For the pet-names, maybe he'll react if you ask him to call you "Brother", since he clearly has a great respect for both his brother by blood as well as by duty.