“…If trajectories are dispersed, individuals might have long periods "between trajectories" during which they are not romantically interested in anyone (Person B). One literature that is especially relevant to the density concept is the literature on predictors of infidelity (Allen et al, 2008;Blow & Hartnett, 2005;Buss, Goetz, Duntley, Asao, & Conroy-Beam, 2017;Drigotas & Barta, 2001). These predictors include actor effects, such as being less agreeable or less conscientious (Schmitt et al, 2004), being anxiously attached (Bogaert & Sadava, 2002), and being male (Petersen & Hyde, 2010); relationship-level effects, such as being less committed (Drigotas, Safstrom, & Gentilia, 1999), less satisfied (Glass & Wright, 1985), and poorer at communicating (Allen et al, 2008); and external factors, such as having weaker ties to the partner's social network (Treas & Giesen, 2000) and having more opportunity to meet potential partners (e.g., Traeen & Stigum, 1998).…”