both involve using the other person as gratification (or, more often than not for women, being used for gratification), they are both low effort for each sex, and psychologically damaging and addictive, they are both heavily promoted and normalized by the mainstream culture but one group gets sympathy from our side and condemnation of the exploitation (men and pornography) while the other group gets blamed and demonized and note here that i'm not defending promiscuity or even non-traditional sexual morals, i am only introducing some nuance and fairness
Canada