always quit masturbation habit first then if need p*rn watching too but never the opposite., masturbation seem the harmless one at first but its actually more toxic than p*rn. p*rn watching is actually your sexual desires. even if we not watch p*rn our mind always think of sex, during day, during night as dreams and much more, when see girls, woman etc. even when watching normal movies, serials we'll think of sex. that's normal and it shows you have reproduction capacity. this was not present before 10 years and now suddenly started during teenage just because of hormone and other reproduction ability.
the thing to stop is masturbation, started like a harmless habit will soon rob every aspect of your healthy sexual interest, goals in life, interest in studies, work and many others. also even in sex only a small fraction of sexual pleasure actually able to experience if doing masturbation. also the movement of penis inside vagina is totally different from that of hand based masturbation, this way conditioning yourself away from reality. and also penis shaft and skin is delicate and using hands and quick motion can desensitize it and might develop death grip etc like problems. to conclude masturbation, never ever do it.
stopping masturbation, makes you super horny, you always have erection at will, get morning erections, every woman seem attractive to you, your dopamine receptor density increases and you find interest in all activities you want including study and work. small small issues, negative thoughts and worries not bothering you much and thus improves social and overall confidence. previously thought hard to achieve things now seem possible as you have more interest and energy you find pleasure in sexual foreplay and can do sex with your partner for hours without losing interest or energy. what masturbation gives is quick pleasure then draining away everything its similar like cocaine and other mood altering drugs, the converse is also true if you not masturbate the horny state, healthy sexual interest and energy always stays with you not for minutes but for hours and days. thus there are countless reasons to stop the masturbation habit and its super easy too. simply not stroke it even if the urge is so strong. at first it seem impossible but its possible, every time you not stroke it you dissociating the association between sexual urge with stroking. you have done this before when you not started this habit, yes watched all sexy videos and still not stroking, even done this in public places, yes saw those beautiful girls and thought all kind of sexual fantasies and your penis become hard and still not stroked. now do the same everywhere including in your private places and its possible