Dolorus Edd's Reason For Joining the Night's Watch (Spoilers Extended)

How did I not know this?

Yoren's an asshole:

Just one question here. Why did he Dolorous Edd take the black?

Yoren told him girls couldn't resist a fellow in a uniform. He left out that bit about celibacy, though. -SSM, Correspondence with Fans, Direwolves and the Seven: 29 October 2001

I guess its partially Edd's fault for probably being from a lesser branch of House Tollett and still not knowing that the men of the Night's Watch are sworn to celibacy.