I don’t recall hearing that all the female nukes on carriers get pregnant on every cruise. So the myth that every female is going to get pregnant is stupid and whoever raises that issue needs to be recalibrated.
There is a pregnancy statistic. It's not 100%, but it's not 0%.
Do men/women assigned to CVNs and Sub Tenders "fool around"? I think we all know the answer. Is that a reason to NOT assign women to ships? Absolutely not. Dealing with pregnancy is NOT the top issue that an XO who has females assigned to his/her ship worries about!
The issue here is the tight quarters. Let's be honest (but PG-13) here...being underway on a submarine doesn't do much for your sex life other than make you extremely frustrated by day 89 of a 90 day underway time. Now, add a beautiful woman walking around...and unlike a CVN or AS....VERY TIGHT QUARTERS. That beautiful woman WILL be a distraction, but perhaps not any more than a civilian office with 10 workers...one of which is the same beautiful woman.
Now the next big milestone and news headline will be "LTJG XXX, the first Submarine Qualified Female Officer". Afterwards, we'll come here or to "The Stupid Shall Be Punished" and find that "she" was pushed through quals, doesn't know her job, and proudly wears the dolphins because they were given to her because she took advantage of the situation (see paragraph above).
As for me, I could care less (active duty or not). However, the COs, Admirals, and Politicians better make sure that these women become true Submariners and not Barbie Dolls wearing a meaningless gold fish on their pretty uniforms.
Overall, this experiment that assigns a few women to the wardroom will work fine. Now, when they assign 9 enlisted women to enlisted submarine berthing. (Laughing)...we'll see how THAT works out. There are always people willing to succumb to their hormones...we read about it in the Navy Times every week.
On the other hand...allow couples openly (e.g., Star Trek culture?). Heck, I'd never want to come back from sea!

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Co60