"You are definitely not the only one romanticized Death, though I do think most people assume it's a man."

Oh the look she gives him, mask or no, through his description of objectification of her says a whole lot. One might assume, based on her expression, that she is pointing out that dealing with objectification is roughly the same thing as dealing with nitrogen at this point. It's just part of the background atmosphere. The fact he catches himself? That is what keeps her from turning those things into actual words that are spoken out loud.

"Sexiest is subjective," her tone is mild. Given their surroundings, points for effort still count. Especially when he comes up with a really good question. "I...have no idea. I never thought to check? I know it kind of grows with me? But I never checked the colors.