1 There is no biological determination for being homo-, bi- or heterosexual. All scientific attempts to prove the biological origins of homosexuality rely on finding statistical correlations between sexual preferences and physical attributes. Bigger earlobes, properties and condition of testicles, features of the brain, DNA sequences etc. cannot count as causalities, even if there were correlations within the group under investigation. That is because in order to prove a cohesion, one has to find not only a formal coherence of phenomena, but one with regards to contents.