Now Playing: Porn Star Student Returns to Campus

Now Playing: Bill Clinton and the Porn Stars

Now Playing: Porn Makes Men Happier

Now Playing: Could Internet Piracy Kill Porn For Good?

Now Playing: 'Mad Men' Cast on Final Season: 'The Beginning of the End'

Now Playing: Residents return to Santa Rosa to rebuild after Tubbs fire tragedy: Part 2

Now Playing: Santa Rosa police officer reunites with 87-year-old he saved in fire: Part 3

Now Playing: In alleged scheme, couple, homeless man accused of raising $400,000 'on a lie'

Now Playing: 'The Boys in the Cave': How 12 boys, coach escaped a cave in Thailand

Now Playing: Monica Lewinsky's affair with Bill Clinton re-examined

Now Playing: Karlie Kloss, from supermodel to coding coach for girls

Now Playing: Country's biggest stars catch up with Robin Roberts ahead of CMA Awards

Now Playing: Scenes from California as unprecedented destruction from fires continue

Now Playing: Millennial surfers moonlight as firefighters

Now Playing: Attacking the vote: how American votes can be 'hacked'

Now Playing: US soldier killed in Afghanistan had one message for US ahead of midterms: Vote

Now Playing: Brian Kemp, Stacey Abrams make final push in tight Georgia governor's race

Now Playing: In Wisconsin, farmers struggling to make ends meet may play vital role in midterms

Now Playing: Post midterms, Sessions out in stunning resignation, some races too close to call

Now Playing: Telling legendary journalist Marie Colvin's story in 'A Private War'