Is it normal i'm curious about ddlg relationships?

I've never engaged in any DDLG or age play stuff, but it interests me. I might prefer SDLG (if such a term exists). I'm kind of a 'switch' in that respect.

For those who don't know, DDLG stands for Dominant Daddy, Little Girl. It's an age play thing (the 'little girl' is actually a woman role-playing). It's not just about fulfilling a male fantasy; there are not only women who love this but also live it, acting out the role almost full-time. It has even made it into mainstream porn (Lucy Doll, for example, who is my favourite porn star).

The only thing that puts me off is the use of the term 'daddy', as that sounds a bit incestuous and sick. I did have some online sex chat with a 19-year-old woman from Canada once, and she sent me explicit pictures and we talked about fantasies, but she wanted to call me 'daddy' and that made it fizzle out.

Thoughts?