你为何要发个呵呵
[nĭ wéi hé yào fā gè hē hē]
Here shows somewhat negative emotions. ‘你’(you) '为何'(why) need ‘要发’ send '个‘a simple message such as ’呵呵'. This short laughter representation can have multiple meanings like awkward silence, sarcasm or not taking something seriously. User doesn’t get why you use such a reaction towards him/herself.