wouldn't this technically be more like masturbation? If its a clone, and its me...
Uh, no. A clone is a being with the exact same genetic makeup, but is an entirely different entity. Clones are essentially genetically identical, excepting age-damage in the DNA. The entirety they become is shaped by both nature (DNA) and nurture (experience), and without identically experienced histories, the clone would differ.
To go full nerd here, perhaps the better question is, if there was an alternate dimension where we are all gender-swapped, would you have sex with the other-sex version of yourself. This introduces all manner of odd cultural dissonance, and there's a lot of difficulty rationalizing that it's the same person.
And I guess, for GayBore, we should ask for a simpler version where there's just a time-machine version, and we pluck an instance of them from just a few seconds into their future, and bring them into the current time. This would be the closest to asking if you'd have sex with yourself... so once again GayBore is advantaged over us.