Final answer:
The recommended method for stringing a longbow or recurve bow is by using a mechanical bowstringer, which ensures safety and avoids damage to the bow.
Step-by-step explanation:
The recommended method for stringing a longbow or a recurve bow is to use a mechanical bowstringer. A mechanical bowstringer is a device designed to help safely and efficiently string a bow without damaging it or risking injury. Hands and brute force may risk twisting the limbs of the bow or causing injury to the archer. Letting the bow "self-string" is not a recognized practice, and asking someone else to do it without proper equipment would pose the same risks as using hands and brute force. Proper technique is important to maintain the integrity of the bow and assure safety.