Is it normal that when i masturbate i fantasize about having a penis?

I am a female in my mid-twenties and I am NOT transgendered. Yes, I am a lesbian (if that even matters), but I'm very feminine and for the most part I love being a woman. However, when I masturbate, I imagine I have a penis I am jerking instead of a clit I am rubbing.

My fantasy is purely physiological, meaning I am focusing just on the sensation of my genitals, and I am not imagining my entire identity as a male. Nor am I thinking of myself as a female, or as any gender alternative either, since I'm not thinking of gender at all. It's just that when I am aroused, I feel in my mind that my clit is actually this big thing that should be able to be gripped and enter into holes. There is an overwhelming need in my clit to screw things and blow a load. It's almost like I have a phantom penis as opposed to having penis envy. I say that because in my mind, when I am turned on, I basically feel as if I already DO have a penis; also, I do not have this fantasy/sensation/feeling/yearning/what-have-you even a little bit when I am not sexually aroused.

Is this masturbation fantasy/sensation of a phantom penis normal?