Evolution: did our guts wind up yummy for microflora like flowers sweet/colorful for bees?

See query. Of course it’s about evolution of symbiosis as well–my mind is still blown from learning (here) about viruses and their sneaky ways of messing with their host.

And I’ve looked at (no time now to find/cite the Wiki) the extraordinary number and types of symbiosis classified.

The birds and bees indeed.

Unrelated: not sure if “like” is correct, but matches character limit, even with dropped “did” at end. For different thread…