When in doubt, write in the way you know is correct

There was a boy whose father was a stickler for correct English.

The boy wanted a pair of mongooses as pets and wrote to his father:

"Dear dad, please send me two mongooses, love, son".

It didn't sound right so he re-wrote the letter:

"Dear dad, please send me two mongeese, love, son".

It still didn't sound right and knowing his father's penchant for correct English, he sent this letter finally:

"Dear dad, please send me a mongoose, love, son.

P.S. On second thoughts, better make it two"
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