To Jason:
The quote is from an interview done by James O'Higgins titled "Sexual Choice, Sexyal Act"

J.O'H: I'm reminded of Cassanova's famous expression that "the best moment in life is when one is climbing the stairs." One can hardly imagine a homosexual today making such a remark.
M.F.: Exactly. Rather, he would say something like: "the best moment of love is when the lover leaves in the taxi."