twisted uli’s are great for the tunica. i do these whenever i can..
set up for twisted uli by being 80% erect. grab the base with an overhand grip and kegal in as much blood as possible. with the other hand grip just behind the glans as if you were going to stretch. compress the glans and shaft. now twist slowly to the left until you feel slight pain then hold for 5 seconds then right until you feel slight pain , doing these for 1 minute. do a normal uli squeeze for 30 seconds the shake it out. I do 5 reps of these, with each set i increase the twist a little more . these hit the tunica very well and i feel it until the next day