This 5 February 2019 video, recorded in Africa, says about itself:
The Smart Way Warthogs Keep Insects at Bay
Warthogs love a good roll in the mud – known as ‘wallowing’ – which keeps them cool. But to protect themselves from insects, warthogs turn to another creature to help out: the mongoose.
Dear Kitty. Some blog 
I saw this in East Africa . 👍
LikeLike
That was a really special sight!
I did see warthogs, in South Africa, but not together with mongooses.
LikeLike
Pingback: Masai Mara animals’ friendships, new research | Dear Kitty. Some blog