Chinese playin'

A man suspects his wife of cheating on him. So, to find out he
hires a Chinese detective to spy on her. It turns out he's
right. The Chinese detective follows his wife and a man to a
restaurant. Then they drove to a hotel. He follows them there
and climbs up a tree so he can see into their room. This whole
time he has been taking notes, so he takes more while watching
them in the room. He writes: "He kiss she, she kiss he. He
undress she, she undress he. He touch she, she touch he. He play
with she, she play with he, I play with me and fall out of tree."