In talking about the simplest, most basic level of complimentarity. Men and women - taken as general groups - physically fit together. Men and men do not, nor do women and women.
If two people of the same-sex did not physically fit, they wouldn’t be able to have sex.
There can be attempts by the partners to simulate this physical complimentarity, but in each case (assuming penetrative sex) either the penetrative organ or the penetrated orifice are not the body part which is clearly designed to facilitate the act.
But are they capable of safely performing the act? That is much more relevant than whether or not the parts were designed with a different function intended.
I just want to point out that when you say something is designed, you are referencing the intent of whoever configured the thing in question. For example if you say that an organ was designed to make babies, you are saying that whoever made that organ that way intended it to be used to make babies. However, this only works if it was made by a person (and I don’t think that the human species was made by a creator), and it’s only relevant insofar as I care about the intent of that person.
For sex, I care more about what the body does (function) over whatever the intent of a hypothetical creator is (design + purpose).
This - the separation of the sexual act from procreation - is the first link in the chain that leads to even contemplating gay “marriage” as something reasonable.
well, are you willing to seriously entertain the possibility of the concept of same-sex marriage being reasonable?
Don’t want to have a child? Then DON’T HAVE SEX.
Don’t want to be in a car crash? Then DON’T GET INTO A CAR!
Don’t want to get mugged? Then DON’T LEAVE THE HOUSE!
Don’t want to become divorced? Then DON’T GET MARRIED!
For all these things, you can have the desired thing with the chances of having the unplanned/unwanted things sufficiently low.
Seriously, for all of the propaganda being thrown at us by the media, people can and do live without having sexual intercourse.
You can also live without a lot of other things, or you can take a few calculated risks in your life.
[Sex is] something that is designed (a term which can apply with either nature or God as “designer”) to be pleasurable so as to encourage us to propogate the species.
Procreation isn’t just a “goal” - it’s the basic biological reason for sexual intercourse.
If the designer is a god, then I would need to be convinced that the intent of the god is more relevant than how the parts function/work together. Like I said before, I don’t care if the god designed human bodies for the purpose of being tasty snacks for aliens, I’m not going to allow myself to be eaten!
I think you’re confusing design and specification/function, but for the sake of brevity, I’ll assume that by being ‘designed by nature’ you mean that forces of nature made it have the specification it has. Well, then I think that the function of procreation led to the human body being what it is now, but that doesn’t mean that you cannot/shouldn’t use them for another reason determined by the individuals.
Any sexual activity that precludes procreation is simply the use of another person as a masturbatory aid.
If that’s so, what you call mutual masturbation (and what most other people call sex) can greatly enhance and enrich the lives of couples (mixed-sex or same-sex).