“After being alive, the next hardest work is having sex. Of course, for some people it isn't work because they need the exercise and they've got the energy for the sex and the sex gives them even more energy. Some people get energy from sex and some people lose energy from sex. I have found that it's too much work. But if you have the time for it, and if you need that exercise—then you should do it. But you could really save yourself a lot of trouble either way by first figuring out whether you're an energy-getter or an energy-loser. As I said, I'm an energy-loser. But I can understand it when I see people running around trying to get some.”

Source: Scott Pilgrim, Volume 6: Scott Pilgrim's Finest Hour

Dottie in Ch. 2
The Group (1963)

Source: Ten Things We Did

"Ricky Williams on fasting, energy, religion" by Tim Graham, ESPN.com (17 September 2010) http://www.espn.com/blog/afceast/post/_/id/18355/ricky-williams-on-fasting-and-religion.

The Humanist interview (2012)
Context: If someone wants to be called a sex worker, I call them a sex worker. But there is a problem with that term, because while it was adopted in goodwill, traffickers have taken it and essentially said, “Okay, if it’s work like any other, somebody has to do it.” In Nevada, there was a time when you couldn’t get unemployment unless you tried sex work first. The same was true in Germany. So the state became a procurer because of the argument that sex is work like any other. This is not a good thing.
I also do not feel proud when I stand in the Sonagachi, the biggest brothel area in all of South Asia. It’s in Kolkata, and everything is written in Bengali except “SEX WORK.” And the term is used in various sinister ways by sex traffickers, who even describe what they do — which is to kidnap or buy people out of villages — as “facilitated migration.”
I’ve only ever met one woman who actually was a prostitute of her own free will. She didn’t have a pimp. She could pick and choose her customers. That’s so rare. So we have to look at the reality and not romanticize it. We have to be clear that you have the right to sell your own body but nobody has the right to sell anybody else’s body. No one has that right.

The Decider (21 July 2007)

On kissing scenes in films, as quoted in " You want to do sex in your house with your door open http://www.punemirror.in/pune/cover-story/You-want-to-do-sex-in-your-house-with-your-door-open/articleshow/49875892.cms" Pune Mirror (22 November 2015)

An Audience With Billy - 1985

Khushwant Singh in Sikh Philosophy Network