Rivals spur men to produce better sperm
Rivals spur men to produce better sperm - Breaking News | Print | New Scientist:
Rivals spur men to produce better sperm
Men who view pornographic images of two men and a woman produce better-quality sperm than men viewing pornographic images of just women, an Australian study reveals.
The finding suggests that humans may be capable of subconsciously increasing semen quality when faced with the possibility that their sperm will have to outrun those of other men in a woman�s reproductive tract.
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