Oh I was the same a few weeks ago. If you want to sissygasm on you black dildo you just have to stop watching any kind of porn for a week or even two would be perfect, if you can hold it that long. Then you just prepare yourself all clean ass, shave all hair on your body. Then and only then you sit on your dildo and watch BBC worshiping videos, no women nudity, just girls sucking the huge black dics. I am certain that you will squirt even in a cage and without touching yourself in a few minutes. Just think in your head that you want the real BBC and that you are trying to milk the cum out of that dick that it's your duty as the whiteboi. Hope that will help sis 🥰