The only time they had experienced discomfort was when henry first trained her to breed the mice-he had asked ted to be present when he showed her how to detect vaginal plugs the evidence of successful copulation .
For many male spiders the risk , of course , is that copulation necessitates placing his juicy abdomen in front of his partner 's jaws ( although some have evolved mechanisms to prevent those jaws closing ) .
When paleontologist henry fairfield osborn studied the small , incompletely-known arms of tyrannosaurus rex in 1906 , for instance , he famously proposed that the dinosaur 's small arms were used for " grasping during copulation . "
Might male-male copulation inspecies as diverse as flour beetles and dolphins have similar , evenpredictable , evolutionary consequences ?
也许在各类物种当中,与面粉甲虫和海豚一样存在着多样性,雄性间交配也有类似的甚至可以预测的结果?
Many male animals , including short-nosed fruit bats , lick their genitals after copulation , and in some species this has been shown to reduce the incidence of such diseases .