The issue of sexual promiscuity has always been biased - whether for or against women depends on your point of view, but the fact is that while men have been exercising sexual freedom for centuries, because they can, like it or not, it took women exercising a comparable level of freedom for people to start calling it a problem.
If you look at most of history, women have been categorised in one of three ways - virgin, mother or whore. Two out of three of these have been considered ‘respectable’, while the third…well, I don’t really need to go into it. Find me any historical or cultural source that places men into the three categories of virgin, father or sexual predator and I might concede that there is no bias in the belief that artificial contraception has increased the problem of promiscuity.
The cow analogy was meant to highlight the problematic nature of the church’s teaching on gay sex. Denying one privilege because of supposed ineligibility for a prerequisite privilege seems a little unfair, and certainly discriminatory, to me.
The notion of underpopulation being the real problem when we have nearly 7 billion people on the planet also strikes me as laughable. People can say all they like that we just need to redistribute resources, but if the earth’s population keeps growing at the exponential rate that it has for the last couple of centuries, there will be vast shortages of space and resources. Remember, not all the land on earth is habitable for humans… Furthermore, in many of the countries that have immense populations, women are culturally expected to submit to their husbands whenever the men want sex. So much for NFP there, and in any case, NFP only works when it is based on a sound education - something that is also largely denied to the women in many developing countries.