Nerve block Retention?

No it is unnatural. Also why are you watching shows like that?

 

Sounds like a weird show. Bet there is some triggers in it as well since why else would it be hard to not get hard?

This requires willpower and also work to succeed. I do not think there is any shortcuts. It is also possible to have an orgasm even if you are not hard. Not to say that one can still watch porn even if they are not hard or even if they take the injection.

 

That is a smart competitor. It could work, you can have a nervous blockage to stop erection.

It has to be done by an anesthesiologist. But it won't last too long. Also you need an operation room.

Also what kind of anesthesiologist will perform it. It's not a valid or too ethical medical reason for doing it.

It'll be expensive if you find someone to do it. And you'll have to get periodical injections in your pubic area to be effective.

It could cause damage and atrophy to your pelvic muscles it's unlikely the blockage will be only in your penis it'll affect the surrounding muscles. This can cause long term effects.

It's interesting for the show. But in real life not very practical.

 

Maybe the @CastratedLegend1 knows a more effective method. Ask him.