You grow a 10 inch cock that can go all night, but you have to have a ten inch cock or dildo in your anus to get hard

You realize that you have always wanted to have a big cock, and you create a reality where you have a ten inch, massively thick cock, that stays hard for hours. It will be bigger than your wrist around, and allow you to cum multiple times.

Then you hear "Your wish is granted, but in order to become erect you much have ten inches of cock, or dildo in your anus. Do you accept this condition?"

You say, "I don't like gay shit. I don't want anything in my butt."

"That answer is unacceptable, the only answer is yes, or no. Anything else will cause a this scenario to reboot."

You gulp, terrified and excited at the same time. Fucked in the ass to be able to fuck a hot girl. Maybe it could work you think. Dildos are allowed so its not like you would have to have some guy fuck you in the ass.

"You must decide you are out of time!"

"I accept," you finally say, accepting the bizarre cost of your new power.