_Yellow Eyes_ (Posleen War) Question

In John Ringo’s and Tom Kratman’s Yellow Eyes, a continuation of the Posleen wars, USS Des Moines, says to the AID, the other half of the forming entity Daisey Mae,

We shall be female … Russian warships are male but they are mostly gay.

Besides finding this hilarious, why?

The only thing I can think of is their Ballet dancers , otherwise its just Kratman having a good laugh at the russkies expense.