Masturbation

If you go back in time and fuck your former self, is it masturbation or just gay sex?

A realated question: Say you go back in time and rape someone, then go back to the future. You eventually meet the person that you raped, and they recognise you. Would they be able to prove it to the police even with DNA testing?

I really need to know this, guys.

okay first of all, it wouldnt be masturbation since the deffinition of masturbation is:

       "erotic stimulation especially of one's own genital organs commonly resulting in orgasm and achieved by manual or other bodily contact exclusive of sexual intercourse, by instrumental manipulation, occasionally by sexual fantasies, or by various combinations of these agencies"

so that doesnt really fit. And I wouldnt classify it as gay sex, it'd just be fucking yourself literally (something i wouldnt mind doing actually, coz im great in bed).

Okay next. It would be possible to prove you raped someone with a DNA test considering your DNA doesnt change as u age!

Also if u wanted to get really picky no if it would be possible considering the paradoxies of time travel, which Im not going into here, cause its to pianful. Just Google it if your that intertesting.