Sexual cravings of any kind can be considered attachment (and idol worship) but there's delusional people who try to get clever and claim their cravings are "empty" irrespective of their sexual preferences.
I'm just very disappointed with Buddhism (and especially Zen) being taken over by the left. It's even more prevalent than "progressive" Christian pastors. I stopped listening to dharma talks years ago because I got sick and tired of having leftist ideology shoved down my throat.
Oh well, their loss I suppose. At least it lead me back to the bible.