How to enable the script after clicking the mouse/touch?^

Hello, how to enable this script after the mouse click /touch ? :3

using UnityEngine;
using System.Collections;

public class yuniti : MonoBehaviour
{

void OnTriggerEnter2D(Collider2D col)
{
    
    {
        if (col.gameObject.tag == "frufii")
        {
            Destroy(col.gameObject);
        }
    }
}

}

OnMouseDown () will be executed even if the script is disabled, so :

private void OnMouseDown ()
{
    enabled = true;
}

Note the object needs a collider, and you have to click on the object. (not sure this is what you want).