As life goes, it doesn't get much better than for male Zeus bugs.
The tiny water bugs that are common along Australia's east coast have an easy life. Their female partners provide free food, transport and unlimited sex whenever they want it.
"All the advantages in this relationship seem to fall to the male with no obvious advantage for the female, yet the female Zeus bug seems a willing partner in this one-sided affair," Dr Mark Elgar, of the University of Melbourne in Australia, said on Wednesday.
Elgar and his colleagues, who studied the unusual creatures, admit to being baffled by their behavior, which defies the norm in animals and insects.
Lucky bug 
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