Husbands On Other Planets

On Planet Kloon, the males are 1/132 the size of females
and spend their entire lives latched on by means of
specially-evolved sucker mouths. "They're basically all
just babies," one female complains, "only little." Planet Corozz-Zimm has no husbands. And no wives either.
During a do-it-yourself project, a male forgot to unplug
the neutron driver and vaporized the civilization.
"Forgot to put the seat down."  On Planet Merg-13, which has
two hundred times the gravity of earth, this simple discourtesy
can be calamitous.  
The females on Planet Xerx wait on their husbands hand
and foot, bringing them food, cleaning up after them,
not letting them lift a finger... and then eat them.