Once again this issue, much like females on submarines raises its ugly head with the new administration. The issue is one in the same because the military isn't like any other job in America and our living conditions are not like most civilians. We have very limited space and funds to allow for privacy and separation of the sexes. On submarines there is precious little privacy and even less toilets/showers.
Under current American mores, we are not comfortable with the sexes mixing in the shower or the head, so we do not have women on submarines on a regular basis. When we do have female visitors, we restrict areas and head times to accommodate the delicate sensibilities of all involved. This is the same issue when you start adding additional sexual orientation groups to this limiting environment. We can not accommodate male, homosexual male, female, homosexual female, and "other" in the limited facilities available either in combat or on a submarine.
You can get all the outsiders you want to line up and say how great it is to allow the gays to serve in the open, but this isn't a 9 to 5 job where you go home and shower alone or the significant other of your choice. This is long separations, rough conditions, and limited facilities that everyone has to share. If it is okay for females to feel uncomfortable and demand separate facilities or at least special hours, so they don't have to feel violated then it goes to reason that everyone should be afforded that right.
I am well aware that many homosexuals proudly serve in today's military and that is just great, but their personal sexual preference would become an issue if it were public knowledge within the unit because there are a lot of people that would find it uncomfortable cohabitating and showering with someone that sees them as an object of sexual desire (see simple male and female example). Until America puts aside its moral standards and opts for fully unisex living, then the military should retain "don't ask, don't tell" and no women on submarines. This is the only reasonable solution because as Joel over on TSSBP has suggested to allow anyone who wants out of the military because of this change in policy can with no penalty would decimate the force and ruin recruiting for the above stated reason. Additionally, the repeal would open the door to huge discrimination issues from all quarters.