If the male bum was not meant to be penetrated, then why is the prostate only stimulated (a very pleasurable sensation), when something pushes INTO the rear?
To your comment about homosexuality not being useful... How very wrong you are.
Back in the days when we were cave men, and other such early tribal days, a non-reproducing adult would have been a HUGE asset. It would have been more assistance in raising and caring for offspring, with less resources being used, meaning a greater quality of life for the offspring of those that did reproduce.
5 healthy children would have been better than 10 sickly and starving ones. Quality over quantity.
As for things that are not natural...
Keeping pets is not natural.
Makeup is not natural (or useful)
Hair dye is not natural (or useful)
Hair brushes and hair ties are not natural (or useful)
Alchahol is not meant to be drunk naturall (and is not useful, in fact, it dehydrates the body)
Soda/pop is not natural (and not useful, in fact, it is often harmfull long term)
Video games are not natural (and 90% of the time, are not useful)
Cigarettes/cigars/pipes are not natural (well, the tobacco is, but not the cigarette. And it is extremely harmful.)
Chemical compounds that we put in food are not natural (and not useful)
Space shuttles are not natural (and really... not that useful)
Rugs are not natural (and not useful)
Toupees and wigs are not natural (and not useful)
Electric lights are not natural (and not neccessary, candles work just fine)
Pillow top mattress' are not natural (not that useful,a normal mattress, or even just a pad on the floor works fine).
Vitamin suppliments are not natural (and would be useless if people ate right)
Artificial flavoring is not natural (and not useful. Use natural flavoring).
I could go on, but I'll stop there.
The artical you listed said the following,
"Much more evidence can be provided. Identical twins, for instance, share the same set of chromosomal patterns. Therefore, if one twin's DNA has a homosexual genetic trait, then it is inevitable that both twins will be homosexuals. However, that is not the case with all twins. When one twin is homosexual, the probability of the other identical twin being homosexual is 50 percent. Thus, the "gay"-gene theory is, once again, debunked by using logical, scientific research."
How ever, we've discovered in the past 5 years or so, that even monozygotic twins ('identical'), are not really identical. They have small genetic and chromosonal differences. Some times, large differences.
Case in point, on the rare occation, one twin can be born male, and the other a female, this is caused by deactivation of certain genes, giving them different phenotypes..
Monozygotic twins can have vastly different developments (both in and out side the womb), do to different genes being activated (You're epigenetics is what activates, or deactivates different genes), and dueto receiving different hormone levels in the womb.
Further proof in their differences are their fingerprints, which are effected by both genetics, and enviornment.
"Monozygous twins share a common genotype. However, most monozygotic twin pairs are not identical; several types of phenotypic discordance may be observed, such as differences in susceptibilities to disease and a wide range of anthropomorphic features. There are several possible explanations for these observations, but one is the existence of epigenetic differences. To address this issue, we examined the global and locus-specific differences in DNA methylation and histone acetylation of a large cohort of monozygotic twins. We found that, although twins are epigenetically indistinguishable during the early years of life, older monozygous twins exhibited remarkable differences in their overall content and genomic distribution of 5-methylcytosine DNA and histone acetylation, affecting their gene-expression portrait. These findings indicate how an appreciation of epigenetics is missing from our understanding of how different phenotypes can be originated from the same genotype. "
Too longto read? Monozygous twins are not as identical as we once thought.