<html>
<body>
<p>The label for the first radio button is outside the form, but still a part of the form.
Try clicking the text label to toggle the male radio button.</p>
<form action="demo_form.php" id="form1">
<input type="radio" name="sex" id="male" value="male"><br>
<label for="female">Female</label>
<input type="radio" name="sex" id="female" value="female"><br><br>
<input type="submit" value="Submit">
</form>
<label for="male" form="form1">Male</label>
</body>
</html>