(nsfw) Can you explain these fetishes?

There are some fetishes that I just do not understand… maybe other people get them and I’m just out of the loop. I mean, I don’t know why people would find them attractive, but I’m curious as to why people do what they do, which is why I’m asking.

The ones I don’t get include:

Bestiality
Bathroom Play
Golden Showers
Extreme Domination (branding, fire, whips)
Furries
Tentacles
Feet
Diapers

Any ideas?