The feminist here understand feminine traits and masculine traits a very specific way, which differs from the framework and understanding of others. Most people consider masculinity and femininity to be neutral personality traits that are traditionally associated with the two sexes but not exclusive to either. Feminists believes that they are taught and conditioned. That is a core concept of pre-third wave feminism. Femininity is taught to women to make them more submissive, more pleasant for men (obsessions with beauty and cleanliness etc) and thus easy to control.

That's why some of the women here are going to find sissification problematic. Imagining oneself in the female gender role is still reinforcing the existence and belief in what they view as an oppressive role. And worse yet, reinforcing the oversexualizing of women.

I won't tell you what to believe, but it helps to understand why these arguments come up. You both are coming from very different frameworks on how gender roles, femininity and masculinity even function.