Prejac training

Anyone else done this or done one finger method?

I typically can go for a long time but I want to just cum as soon as I see my wife’s pussy. I just have trouble not masturbating. I just can’t help it, otherwise my mind is mush.
I just started it this year using the Sarah method, combined with resensitization of my penis and partial chastity. I am now constantly within 60 seconds and often much lower. This is both in sex and masturbation.