JQuery deferred.done executes a predefined function instantly, but does not declare a function inside

My problem is weird as the title says. Here's the code:

Case 1:

    var first = $.ajax({ // about 500ms request
        url: myUrl
        success: function() { console.log(1); }
    });

    var second = $.ajax({ // about 200 ms request
        url: myUrl
        success: function() { console.log(2); }
    });


    $.when(first, second).done(function() { console.log(3); });

      

        
        
        
      

    

Logs 2, 1, 3. Everything is fine, just what I wanted.

Case 2:

    var first = $.ajax({ // about 500ms request
        url: myUrl
        success: function() { console.log(1); }
    });

    var second = $.ajax({ // about 200 ms request
        url: myUrl
        success: function() { console.log(2); }
    });

    function logthree() {
        console.log(3);
    }


    $.when(first, second).done(logthree());

      

        
        
        
      

    

Logs 3, 2, 1, which is the problem. The logthree () function should only run after the first and second permission.

Why is this happening? How can I use case 2 without any problem?

Note. The same happens if the first and second functions and they return $ .ajax.

Note. The same happens if the first and second are $ .get.