'Guy Love, Between Two Guys' is a term typically used to describe the relationship between Billy Black and Charlie Swan (who are always out "fishing" *wink, wink*). But it can also be applied to the relationship between Aro and Carlisle Cullen, Aro and Caius, and most likely Aro and Marcus because there is no other reason for Aro to keep Marcus around. Really, seeing relationships isn't a power. Aro is, basically, a giant bromantic slut. Another example of this is Riley and Diego. It was Diego's torture and death by Victoria that broke Riley? Really? (Quelle ironie).