What do you advise if I'm extremely horny, how can I stop myself?
What's the problem?
Why is being horny a concern? Is this a change from your normal sex drive? Is is causing you distress? Is it interfering with your ability to work or have successful relationships? Many people have high sex drives so maybe you are just one of those people.
If being horny is causing you problems or concerns then check it our physically and emotionally just to be sure.