Jovial, the most important thing you can do in order to live openly as a straight man is not to care about anyone or anything. You've got to learn that caring about things is simply not cool. Be detached in everything, answer "whatever" to every question and treat girls as your playthings. The minute they start to intrude in your life, dump them. Yes, try to come on to every girl you can because the more you fuck, the more straight you are. (It's true. It's a fact.) Make sure you learn how to "whoot, whoot" really loud for no apparent reason, and keep the TV on ESPN all day long. If you find yourself beginning to have an emotion or a serious thought, stuff it and drink a beer instead. Also you need to learn how to scratch your ass without looking self-conscious in mixed company.
And definitely no colognes, after shave, or wussy skin lotions. Don't trim your finger or toe nails.
Just check your brains at the door, bud, and you'll be the perfect straight guy.