[daxfohl]

Same reason male seahorses get pregnant.

[gerdesj]

No the males don't get pregnant or give birth. They brood, ie they look after the little ones.

See the Reproduction section of: https://en.wikipedia.org/wiki/Seahorse for details

[jonny_eh]

This must make some people in Congress really angry.

[lioeters]

Wait until they hear about some mushrooms with more than twenty thousand genders.