Male African bat bugs have developed vaginas that look different from those of their female counterparts, in order to reduce their chances of being sexually attacked by other males who pierce their abdomens with hypodermic penises and inject sperm into their bloodstreams; female bat bugs have retaliated by acquiring male vaginas.
Male African bat bugs have developed vaginas that look different from those of their female counterparts, in order to reduce their chances of being sexually attacked by other males who pierce their abdomens with hypodermic penises and inject sperm into their bloodstreams; female bat bugs have retaliated by acquiring male vaginas.
