Want To Know Why You’re Gay?

A team of scientists may have the answer! Dr. Urban Friberg of the Uppsala University in Sweden and Dr. William Rice of University of UC Santa Barbara, who are likely totally gay with each other when not doing gay science, suggest the mysterious evolutionary biology of homosexuality may have something to do with “epi-marks.” Sounds pretty gay, right?

Building on “previous studies” that demonstrated “that homosexuality runs in families” but couldn’t pinpoint a so-called gay gene, Friberg and Rice have proposed in The Quarterly Review of Biology that something called epigenetics may be the crucial factor:

Epi-marks constitute an extra layer of information attached to our genes’ backbones that regulates their expression. While genes hold the instructions, epi-marks direct how those instructions are carried out—when, where and how much a gene is expressed during development. Epi-marks are usually produced anew each generation, but recent evidence demonstrates that they sometimes carryover between generations and thus can contribute to similarity among relatives, resembling the effect of shared genes.

Got all that? In a nutshell, it means that your opposite-sex parent probably contributed a sex-specific epi-mark to your DNA that never got erased, making you decidedly, irrevocably gay. So thank your mom or dad, depending: without them you’d be a miserable straight like the rest of us.

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