>>335545789
it's a guy thing, it is a show of character and an invitation to join in, the proper etiquette is to belch back preferrably louder than the previously belching person, if no belch is available "nice" or "ill drink to that" works fine too, the worst way to fail this test of manhood is to say anything along the lines of "eww"
you have failed the belch test your manhood will be retrieved momentarily