How To Cum Hands Free When Riding A Dildo?

I was very very close lot's of pre cum and building,but it seems I can never finish it like I do with normal masturbation or sex.

I get extremely horny and I cannot ejaculate without help of my hand. My dick cannot be rock hard,semi hard at the best.

Lots of pre cum and as I stated little cum maybe, but that is nothing. Feeling is incredible, mind blowing, shaking, it's undescrbable, like im getting many mini orgasams non stop.

But no matter what I try, utlimately cant jizz it off like a boss. Have to use my hand always.

Any tricks or tips please? I use Doc Johnson realistic 7 and 8 inch dildo, I rid dildo on top deep, hard and fast.

 

Oh how awkward it will be at work Monday morning. Ick.

 

I have a large dildo that I use.. sometimes if I let it hit the bottom of my rectum and pull it out my cock will spasm like I'm having an orgasm.. but it's not a real orgasm. I also sometimes use a small dab of toothpaste on the dildo, and this makes my ass spasm so the orgasm is more intense. I think u can trick your butt into having an orgasm.. but the dildo has to be big enough to make your ass lose control.