_________________________________________________Commissions now open - I'm young and need the money
I say that F. is for subtle. And now for the obligatory halfassed justification!
Whereas this may seem like (and,admittedly, basically is) a dumb joke it is infact referencing to a historical occurence. Usually (or rather, in many cultures and eras) neither pirates nor sailors in general used to have woman on their ships for females were thought to be not as physically suited to the hard conditions,being a major distraction as well as frequently causing quarrels amongst the sailors.
Since none of that is very helpful in a place where teamwork could be vital at times the impression of “women on ship are bad luck” formed.
So with them being banned,the proximity in the night cabins and long,long journeys you may imagine the hilarity that ensued.
Alfred Eff' Jones & Cap'n Kirk (c) Hidekaz Himaruya
<edit>It's probably obvious anyways but I'd feel even more like a bastard if I weren't to say this: The first panel's referencend from a photograph on photobucket. I didn't take it but can't find the link anymore.