STD’s is short for Sexually Transmitted Diseases: illnesses you mainly get by having sex. When you had unsafe sex you may be infected without knowing it. Often there are no symptoms, but the disease will affect your body.
The STD top ten in the Netherlands.
How can you protect yourself?
Common symptoms.
Where can I get a physical exam for STD’s?
What happens during a physical check-up?

Last week I had sex without using a condom. Should I be tested for STD’s?
I gave a guy a blow job. Now I have little red spots on my lips. Could it be a STD?

See also: safe sex