Masturbation is defined by achieving sexual gratification by means exclusive of coitus. If you are engaged in coitus with your clone, it's certainly not masturbation.
And since a clone is a genetic duplicate, it shares enough ties (obviously) that it would be distinguished as coming from the same genealogy. It'd be like fucking your identical twin.
Ersatz Didn't Space Moose already answer this question?
Camonk It's hot cause I'm extremely good-looking. Like in transcends sex. So it wouldn't be gay in my case.
kennydra It would be incest, but it would be the best incest ever. I'd do it, but it would be a love that could never be, 'cause I'm strictly a top. If I could make my clone a bottom, that would be great, plus that could be how I tell the real me from my clone apart. Yes.....great plan....