She is a model and a whore in her free time
Walking down a catwalk, wearing underwear that is attractive and letting people take photos of her is what she likes to do because that way, she can show men that she has a desirable body. And she likes to be desired. Then there is the part of materializing all that. Because that’s when she, in her free time, is a whore. Although by vocation she is a model. Because she has to enjoy having the body of a hot slut and every time a male wants to fuck her, she puts a price. It’s a mere formality, because she still loves having a cock inside her pussy.