One out of four kids in Lesotho has AIDS, and the idea of the charity is to help the children first fight the stigma of living with HIV and then teach them how to live with it and survive and get an education so all these children can have a normal life. When you're changing the life of so many kids - one out of four is a big number - you change the direction of an entire nation.

The military played polo. Polo, really, started as a game to train for war.

I have to say my relationship with the horses is the biggest thing, and it grows. I love horses more and more every day, and I'm breeding, so when I'm playing a horse that's the son of a horse, the daughter of a horse I used to play, it's like bonding. So I think that's the most amazing part of it. It's the passion that we polo players have for the horses first, and then the game and the strategy of the game and winning and the team and your teammates, all of those things are a big part of it, but the horses are my favorite part.

I started playing polo when I was nine years old. I'm from Argentina, so in Argentina polo is more of a common thing. We have a lot of horses and a polo tradition and it's something that goes from generation to generation.

Prince Harry is a great guy, very competitive; he's been playing polo all his life. Riding is in his blood. His grandmother loves horses, his grandfather played polo, his father played polo, his brother plays polo, so it's in his blood. He likes to play hard, we joke about it and it's great.

I'm honored and I think the relationship with Ralph Lauren brand has been so long because it goes beyond the face or the guy. I don't feel that I'm a model at all, because I'm not. I'm a professional polo player that endorses a clothing company.

When you have a kid your life changes completely, it's not about you anymore.