I like to think of the relationships as essentially platonic, and physical interaction therein as familial or humanistic rather than sexual.
This is only personal opinion/preference, however, since as with many of the great ideas in ABe-involving projects, it is left open to interpretation. The mystery can be more interesting than the answer.
This does make me wonder, do the androgynous characteristics often present in ABe characters make them seem more asexual, homosexual, both, neither?