Third-degree relatives (such as half-aunt, half-nephew, first cousin) on average share 12.5% genes, and sexual relations between them is viewed differently in various cultures, from being discouraged to being socially acceptable.
The children of incestuous relationships were regarded as illegitimate, and are still so regarded in some societies today.
(AP Photo/Courtesy of Awel el Kheit)CAIRO (AP) — Waleed Hammad dressed conservatively for his secret mission into the world of sexual harassment and abuse on the streets of Cairo, donning a long tan skirt and sleeved shirt, and at times covering his head like many Egyptian women.
The 24-year-old actor walked the sidewalks, hidden cameras in tow, for an investigative television report, hoping the broadcast would enlighten national debate about how to combat deep-rooted day-to-day sexual harassment and abuse in this patriarchal society.
Their comments have inflamed the discourse, particularly at a time when Egypt's volatile and polarized politics blur social and political issues following the 2011 uprising that ousted longtime autocrat Hosni Mubarak.
For the descriptive term for blood-related kin, see consanguinity.
This typically includes sexual activity between people in a consanguineous relationship (blood relations), and sometimes those related by affinity, stepfamily, those related by adoption or marriage, or members of the same clan or lineage.
But friends don't share genetic ties or offspring, and yet they still help each other out.
[6 Scientific Tips for a Successful Relationship] Bleske-Rechek and her colleagues were interested in how heterosexual, opposite-sex friends dealt with issues of sexual attraction that might come up in their friendships.
"But the data I've been collecting suggests that attractions can get in the way." Friends without benefits Friendship is an interesting area to study because it doesn't have obvious reproductive advantages, Bleske-Rechek told Live Science.