Còn ai nhớ năm 2001: phim "A Space Odyssey"?

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Masturbation has been documented in many primate species beyond
humans. Even the use of masturbatory (thủ dâm) tools – what we would call sex toys – has been documented in the wild, such as in male long-tailed macaques. Researchers now report witnessing for the first time a wild male chimpanzee using a human-made object as a masturbatory tool.

The report comes from Bulindi, Uganda in August 2018, where a juvenile male chimp (con tinh tinh) named Araali was seen inserting his penis (dương vật) into a discarded (bỏ đi) plastic bottle. The scientists spotted the ape playing with an empty plastic herbicide bottle, making pelvic (xương chậu) thrust (thúc, đẩy) movements, repositioning the bottle after his penis came out of it. The team report that the male chimp had a "play face", a relaxed open mouth (mồm há thư giãn) expression (biểu hiện) they make when they are having fun.

The team couldn’t determine if the chimp ejaculated into the bottle. This is not just the scientists being overly nosy about what poor Araali gets up to – this event could give insights into the wider question of where the masturbatory behavior comes from in wild chimpanzees. The team doesn’t believe it is related to a way to improve sperm quality (chất lượng tinh trùng) or as a sexual outlet, given that Araali was a subordinate male in the group.

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