ROLL 2!
Yep, I'm handing you away slut. For this roll, you're gonna be gay.
Get down in the doggy position, spread that ass, and then fuck it with one hand with that dildo. You can jerk off with the other but only if, for each in of the dildo, you do a thrust down with your hand, so that one in out of the dildo is one stroke.
Watch this from 1min30 to keep it fun and give you an example;
http://www.xvideos.com/video1720057/thug_assfucked_doggystyle_in_alley
Enjoy.