do you build your perfect fantasy partner in your head when you masturbate?

Guy here, I was wondering what people do when they masturbate regarding the person they are imagining. Do you imagine someone you actually know in your life like a friend or do you build the “perfect partner” in your head when this happens? Trying to type this out feels sort of goofy but here it is:

My perfect partner is a gorgeous woman, gorgeous shapely body/nice breasts/legs, etc, with the pedicured feet of a goddess which fit into some sexy high heels(note: So 99.8 percent of the time I don’t have any attraction to feet but some times a girl has like perfect feet and it turns 180). And another feature about her is that she has a nice dick and she has hyperspermia(she can shoot really huge loads).

I have a 9 inch dildo that I use when I act out this fantasy and I give a blow job to the dildo making sure do do plenty of deep throating and I go totally to putty during this. I feel ridiculous because it’s not even dick that I want if that makes sense. It only applies when the dick is attached to a woman and then I am game I guess? Well I find myself instinctively making like submissive/hungry/eager/etc sounds while I suck and it builds me up to the most explosive orgasms. I imagine she is going to cum down my throat or into my mouth for me to swallow at the end. I cum so hard from imaganing this kind of a thing that it hurts almost lmao but it’s crazy why this thing presses my buttons. One time I even imagine Rihanna had a dick and I sucked her dry. It’s crazy