My very first dom did this to me but he had the fuck machine on full speed and a bigger dildo, and he fried my balls so much with the electro, I was forced to cum over 15 times before he would stop, I made it to 4 before I was begging him to stop
I love being hooked up like this I could sit in a chair like that all freaking day. It's amazing on an alpha Master sticks his dick in my mouth while I'm like that.