Costumero Ramos, Víctor Barrós Loscertales, Alfonso Bustamante, Juan Carlos Ventura Campos, Noelia Fuentes Claramonte, Paola Rosell Negre, Patricia Ávila Rivera, César Reward sensitivity is associated with brain activity during erotic stimulus processing PLoS One 10.1371/journal.pone.0066940 2013 2013