Guild Wars 2

At the Durgar’s Homestead PoI in Snowden Drifts, Erli Ravenfeather explains to us what a moot father is. But when he explains that the winner gets the moot mother for the year, we can answer this with “What if the moot mother wants another moot mother instead?” I think the latter one is supposed to be moot father

Moot mothers can’t be interested in other moot mothers?

Also, interestingly, I do not see that dialogue option when I speak with him.
Edit: on my thief. Another character had a dialogue option that led to encouraging him to talk to Vastra that the thief did not, which seems to have been a side-effect of having high "dignity" on that character (the thief was high in ferocity).

They were a human and a norn, and neither had the line you captured available.

However, when I took a sylvari there, I did see the line available. Given his blank stare/response and your character’s line of, "How strange" in reaction, I’m pretty sure this is NOT a bug. Just further proof that sylvari are pretty awesome and comfortable with same-sex relationships.