"Pyramids on the Nile" from Season 2

Lucy calls what she does a "hair tickle", but we know what it really is.

Even the description makes it seem hot:

"He says the candle looks dangerous and she tells him to lie back. They are on the floor and she places a pillow under his head. She is straddling him and she puts his hands under her knees. She takes the robe off his shoulders, then slides her hands slowly down his chest. Now, it's time for the candle. Richard isn't thrilled about hot wax, and Ling assures him that it will only be one ceremonial drop, "then nothing but hair." The wax lands on his chest and he gasps. Ling then puts the candle down and leans over him. She takes her hair and lays it out over her head. Then she slowly pulls her head back over his body, caressing his body all the way down with her hair. Richard looks as if he is completely enjoying it."