Normally to inseminate a female you have to have some sex with that. You know, male and female sex organs doing their thing. Well:
>[Milan Rezic, an entomologist at the Crop Research Institute in Prague, has spotted a spider circumventing this problem by delivering sperm directly to the ovaries via holes that the males bore directly in the females’ abdomens.][link]
[link]: http://news.bbc.co.uk/2/hi/science/nature/8023413.stm “BBC NEWS | Science & Environment | Spider sex violent but effective”