So Pnut has a BFF his name his Todd (see picture

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They get along very well, the only thing that drives me CRAZY and I know Pnut as well, Todd humps Pnut almost 80% of them time they are hanging out

It drives me crazy!! The owner is my good friend Shana, and she tries to stop him but not in the sense of making him stop. She will just push him away and tell him to stop.
We went to the outside mall today and 80% of the time we were walking Todd tried to hump Pnut, and when we stopped in stores, it was to the point where I wanted to carry Pnut

Then when I was holding Pnut Todd would cry and look at me to put him down...It was really annoying.
I am getting sick of it, and I want to tell her SOMETHING, but I don't know how to go about it..
What would you guys do, how would you tell her?