Finger whistle?! help.?

ok. this is so confusing! i need to learn how to whistle! everyone i know knows how to whistle with their fingers. They just tell me, '; put your fingers pressed against your tongue and blow';. and THATS supposed to show me how?! yeah right. i need real detailed answers. please help! thanx.Finger whistle?! help.?
You don't need fingers if you can control your tongue. Curl and flatten the tip up against the rear of your upper lip. Leave a slight opening between the tip of your tongue and lip. You may need to tighten your lips against your teeth. Once you have the gap, blow. By varying the gap and the force you can vary the pitch. It's much more impressive to whistle loudly without fingers! Practice, practice, practice. When your parents start yelling at you, you've got it down!Finger whistle?! help.?
Put the tip of your pointer finger and tip of thumb together. Like you making and ';ok'; sing. Place the tip of your tongue at the roof of your mouth. (This is the shape you tongue should be. Don't leave your tongue touching the roof.) Place your pointer finger and thumb (';ok';sign) on the tip of you tongue. Under it though but at point of tongue. Rest the Ok sing on bottom lip. Your bottom lip should not be past your second knuckle. Good luck and practice you will get it.

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