ok masturebation is wen a guy with an erected penis strokes his penis in a up and down motion and after a wile the male will reach climax and a white sticky flued will be ejaculated from the penis. most young boys will be afraid the first time thay ejaculate because its just weird. but dont be , and dont be ashamed of masturebating its normal .
now the testis produce the sperm (white flued) and shOOTS up the vas deferens and out the penis. the erection is caused by blood filling up the corpus cavemosum and pumping it full of blood and then the penis erects (grows)
マスターベーション (masutaabeeshon) 自慰する事 (jii suru koto)
Honestly, masturbation can't really be affected by diet. It's more of a neurological/willpower thing.