Fiercely decided, as I was, to ruin my sexual stamina and to become totally unable to hold back my cum at the slightest sexual stimulation, I have bought, a couple of weeks ago, those curses in that purpose :

• Humiliated Premature Ejaculator by EMG
• Premature Ejaculator Curse by Jackstock

I've been listening them several times and I still do despite I'm not 100% convinced of their efficientness. 
Though, I have to confess something that happened that was very unusual recently.
Last time I got my dick sucked, I got the feeling things were going to be faster that usual for me. The realisation of this intuition boosted my excitement so much than within a couple of minutes, I cummed ! 
Trust me, it was way faster and easier than usual. I don't know if that was related to the curses or not but I wanted to put in my diary what I hope could be a milestone in my inability to hold back my cum.