I used to buck the system and wear clothing that was normal looking to non-cyclist's. So anything you want that doesn't have a lot of bulky seams in the crotch and bottom. I also highly recommend you don't wear any cotton material to cover body parts that move and rub against each other or that rub on the bike saddle.

And that goes for underwear too. Gets some sports underwear that is made of synthetic material. When sweat gets on cotton material it becomes very abrasive and will loose any support that it may have given you. Synthetic material will hold it's shape and stay form fitting when wet or dry.

After you've ridden a while and start getting into longer and longer rides, the mamil concept will start to make sense. Might take a year or two, but if you continue to cycle for several hours at a time, you'll be posting a question.... "bibs or shorts"