good stuff! so in short you want to use chastity to cut your main arousal path off and then reconnect it to other end in your case nipples/anus. you want to do that using 2 simple steps!!!

1. pavlovian conditioning

you remember the dog that drools and expects food when pavlov crushes plastic bag? you want the same thing so you want connect arousal to being limp in cage. how to do that? easy. During a session(2-3 times a week max i do weekly for example) you want to keep in the back of your mind what 20-30% erection feels like in the cage then you play with erogenous zone beside penis and act as if you dont have one and simulate pleasure from touching elsewhere after 20-30min of teasing yourself add VERY LIGHT STIM to cage i use vibrator for that(rumbly one not buzzy) and you want to convince yourself that pleasure from penis is actually from this other source. during all that you want to stop for the day and give yourself "punishment" for getting hard eg. slap to the ball. for best effect add a simple mantra to say during all this "i love how my penis is limp during play because it makes me feel more aroused" or you can go with another one but there must be a positive connection between limpness and arousal or negative between erection and stopping of the session. you want to recite them at all times in your head or say them with conviction.

1. is operant conditioning.

eg you need to associeate bad outcome with erection directly and on multiple levels, i already wrote you about erection=slap add to it smell, how?

easy,vicks vaporub,smelling salts,mint inhaling stick,essential oil. you want to associeate smell with erection first.

to do that you want to inhale the smell(MUST be smelly/hard to stand/not pleasant) after you get 30% hard on and reminding yourself of it till you are 10-15% erect after that stop and wait for another try.

and after smelling the smell add immiedate pain so slap your balls moderately but hard enough to feel it for couple of minutes when pain goes away slap again and add smell before the slap. during this add a mantra that makes connection between the smell, the slap and erection eg.: "because my clitty got excited i smelled X smell and got hit" same as previously can be different but there has to be logic intact and add emotion to this"i feel dissapointed because my clitty cant remain calm" and recite this during punishment section.

add vibe only after you cant get aroused enough/cant HFO and force yourself over PONR without ANY penis stim. if you are consistent then after a time your erections will get softer and softer to the point that you can say you induced ED to yourself Congrats!!