why is it good to say excuse me after i burp

[KingEzra123]

excuse me why is it good to say excuse me after i burp

[Roaring Lion]

Mm, there is no exact good reason, but generally because it is a unpleasant sound, or more rather it can produce a foul smell. So it is like recognition of one's own unpleasant action, even if not on purpose. To let others know you care about their comfort.