This is not obvious at all, especially the effects on health. Mental health - ok, that might be something that you can deduce based on examples (grumpy old sol

This is not obvious at all, especially the effects on health. Mental health - ok, that might be something that you can deduce based on examples (grumpy old solo grandpa that yells in the air - mental issues). But can you really conclude just from common sense that human relationships have effect on your _physical health_?