The initials LGBTTQQIAAP means (lesbian, gay, bisexual, transgender, transsexual, queer, questioning, intersex, asexual, ally, pansexual) although such initials are sometimes criticized for being confusing and leaving some people out they cover the gamut of human sexual preferences. They cannot all be contributed to a DNA mix-ups but a few character breakdowns as well. Why some people doesn't have heterosexual relationships cannot be explained, or can they, or are society and science unwilling to tell the truth because of religion. Science can tell you why humans are predominately right-handed or right-brain but not gay. If science was to tell the truth bisexual and pansexual are two of the nearly dozen sexual preferences that cannot be contributed to DNA.

DNA molecules are the basis for heredity, that contains the patterns for constructing proteins and problems in the body. DNA can control how you think and act but it is in terms of more or less a particular enzyme. To be gay can be more Testosterone for women and less for men. So you are gay at birth. But how do you become bisexual or pansexual to love sexually both genders. What happened at birth? I conclude that nothing happened at birth and that bisexuals and pansexuals of the LGBTTQQIAAP groups are two categories that are more psychological than DNA. Scientists

have observed a variety of species

mating in a misdirected way repeatedly but they are in a mode of reproducing by any means necessary. You can also say that homosexuality is a means of agape aka unconditional love to determine a mate but bisexuality seems to have one objective and that is to find sex and not necessarily in a homosexual relationship.

Being attractive to the other sex I can understand but being sexually attracted not exclusively to people of one particular gender; but attracted to both men and women is more psychological than biological. They draw no lines. It like having a craving for both sugar and salt a want not necessarily a need.