Wait, why is relationship with Shadowsheart option for a man of faith? Only because she is a cleric or is there something else I'm missing?
I believe he is referring to the potential for same sex romancing options.
I believe he is refering to concidering all other to be too vulgar with: "
Hey PC ... we know each other for three whole days, lets bang like a rabbits!" kind of attitude.

Compared to her gentle sharing bottle of wine, followed by single shy kiss under the stars.
Or maybe bit of both ...