Ashton Kutcher started dabbling in tech startups a few years ago, but he is no longer a dabbler, as his his Disrupt interview with Charlie Rose last week made clear. Kutcher is an investor in a dozen tech companies, including Skype, Foursquare, Path, and Kevin Rose's Milk. In this backstage interview with Sarah Lacy, he reveals that he is also an investor in AirBnB (whose CEO Brian Chesky was also at Disrupt ) and why he thinks the company is different. Kutcher talks about his approach to investing in startups. At first it was very much a leraning process for him. "I became an apprentice" to other tech investors, he says, because "I don't like to fail."