yeah, it is true, but some orgamisms have good biological fitness, and other organisms have poor biological fitness. Diversity is ok, but sometimes it is better to increase biological fitness of
![Popcorm pop pop](/forum/styles/default/xenforo/smilies/1/popcorm.gif)
ulation. For example malnutrution during childhood disrupts brain development and person with such brain can be dropped out from school, so he will live in povetry and social isolation. We can say that it is natural variation like the size of bones, but in fact such varaiton decrease fitness of the organism, so it is better to provide good nutrution for babies for their brain development. A lot of sexual peculiriarities, paraphilias dicrease biological fitness of person, also some of them can predispose a person to commit sexual crimes (pedophilia). German sexologists think that it is not possible to change sexual preference structure, but I think that endeavor to do it is ok. It can be difficult, but it is worth to try. Also if some gays want to increas their reproductive fitness then medical and psychological resources should be aviable for such for them for such purpose.