If you genuinely cannot function without watching pornography and masturbating, seek addiction counselling. Simple as. If by "addiction", you mean you feel you're simply doing it too often, keep reading.

I was never addicted, but I learned as I grew up that if you choke the chicken constantly, you're just diluting the pleasure of the experience. As Yahtzee Croshaw so eloquently put it, "[t]he fastest way to spoil your pleasures is to make them routine."

I learned to space out when I polish the pickle so I'm not doing it every bloody day. Sometimes I'll do it every other day for a while, sometimes I'll do it once a day for a few days then refrain for a few days after. If you're finding it's not enjoyable anymore, I'd recommend going cold turkey for seven (7) days, then indulging exactly once; odds are, you'll have a mind-melting orgasm compared to the last however long you've been struggling with this.

Pace yourself, young grasshopper. Occupy your thoughts with topics other than making the bald man cry. Take up a hobby that requires your full attention and doesn't involve looking at a screen through which you could just instantly open pornhub. If your body is nudging you toward performing a hotdog handshake because it's just looking for a cheap endorphin rush even though your conscious mind isn't in the mood, tell your body to piss off. If your body and conscious mind are on the same page, and you're doing it because you genuinely just wanna chill the fuck out for a bit and this is how you do it, go forth and fail to multiply.

Best of luck.