What has sexualy got to do with love? Wath changes within the body and mind show that a girl has changed into a woman and a boy into a man? In mosquito, boys tell of their first ejaculation and their fantasies. Girls describe what it is like to start menstruating and discovering in their sports lessons that they have a bosom. What other physical differences are there between girls and boys? Two girls ask a female doctor. In a sex education play, some youngsters argue at what age boys /girls should sleep with each other. Jasna fights with her father for the right to take the pill. How is sex the first time? What inhibitions are there? What fears? Girls and boys with different experiences speak about them. And in the music film 'they do it' we see gabi and Uwe visiting the zoo to find out how animals do it. As always in mosquito there are also sketches and cartoons.