A deep love of Batman, and those that also love Batman.
Regardless of sexual preference, all batsexuals are tolerant of each other, and when coming across a fellow batsexual, a series of "DUDE!"s and high-fives ensue.
Batsexuality can lead to many great friendships, or relationships.
1. When Hank and Charlie met at the party, it was awkward until they discovered they were both batsexuals. The rest of the night was spent arguing about who was a better Caped Crusader; George Clooney or Christian Bale.
2. The other night, I hosted a six hour long movie marathon with all of my batsexual friends.