Well first off current Army policy is "don't ask, don't tell" so techniqually gays can serve, but if you are heterosexual I don't think there will be much of a chance to get aroused, you will pretty much only see ppl of the same sex as you, they do not put anything in your drink. Basic and AIT will be exhausting enough, no need to suppress anything, if you are not sleeping, you are busy and when you are not busy you will be sleeping. Dont worry about that! You might though wanna look into the side effects of the Anthrax vaccine which you will be REQUIRED to have before deploying or going to Korea, if you need something to worry, check those out