The side referee looked at the ass of the Ukrainian Mikolenko for a long time and then decided to touch it

They can be sued for this.
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In a recent match between Arsenal and Everton, which ended in a 3-0 defeat of the Butterscotch, side referee Stuart Burt has allowed himself a rather strange behavior.

When the ball was thrown from behind by Everton's Ukrainian defender Vitaliy Mykolenko, he looked at the player's shin for a long time, then still allowed himself to touch.

It seems to be nothing fatal; in contact sports, such things happen, but why the referee should do this remains a mystery.