Having fun has lots of benefits:
. Reduce pain and discomfort;
. Reduce stress, depression, and anxiety;
. Improve mood;
. Boost self-esteem;
. Support a healthy immune system;
. Support memory and cognitive function.
Lacking fun may cause depression and various mental health issues. But we need to have fun in a natural way, not from alcohols, drugs and addictions, which are detrimental to our health.
Check ChatGPT's answer for more information.