right here in this now historical image dating way back to the 1990s when max and a fellow named peter tieel tried transferring money between two mobile devices and they called their service paypal. their company was bought by elon musk. if you need me to sketch out the rest of that story for you, you are watching the wrong television show. if you're worried about the women getting pregnant part, there's an app called glow which helps women track their fertility. thousands of women have used know to help them become pregnant. so, i find it remarkable that there is an app, because there's huge criticism out there, particularly of men, particularly of young men, that they are making apps that only are important to young entrepreneurs in san francisco. and here you made an apps that is important to at least half of the world. >> might be because i'm not a young entrepreneur in san francisco any more. younger. i've given you the benefit of the doubt. >> youthful looking. yeah, i think it's -- sara knows all too well, i have made it my most recent mission to solve meaningful problems, and solving