You can set it up by dividing teams by just using numbers for example if there are two teams just alternate between 1 and 2. It really just comes down to being equal only do for one what you will do for all.
Teenages perceive sexual activities as exciting and good. They think that is will be OK if they go ahead and try those things. When in reality, it will put them in greater risk of STD's or STI's, or an unwanted pregnancy. :)