A person might have beaten daily as a kid and has grown up full of anger - wants to kill someone. Or maybe they had a normal life and still have a tremendous desire to do someone - anyone, else harm. Maybe even one day a gene will be found that predisposes someone to random violence. Some of those people, no matter what the cause of their impulses, will not be able to control themselves, but them some will. No matter what the cause of that desire or impulse, we can't and don't dismiss it as okay or even natural just because it may somehow be linked to a physiological condition or state, psychological conditions or previous experiences. For me, a simple glance at the anatomy of a man and a woman tells me what is natural and what is not.
Sex Positive advocates (like those cited as Canadian researchers in this article) don’t care about the “science” of sexual desires.
They seek to end all moral judgements over sexual pairings regardless of sex, age, relation, marital status, number, or species of partner(s). They see abstinence as unhealthy because it is a supression of sexual desires.
As is telling a person not to act on homosexual feelings.
In society we screen out potential “partners” on a number of criteria: Looks, “availablity” (are they married or seeing someone), maturity, not of the same family... Sex positive advocates think that is foolish. If you want to eat an apple, “do it”.
Reich, Kinnsey, and feminists have pushed this agenda for the better part of the 20th century. It is a global campaign. In America we are still reviled by the rest of the world for being “too puritanical”.