Why does the thought of a larger male dominating me turn me on ?

It's one of those old primating things. We're Just animals so naturally you want to mate with the biggest, strongest male. Hence you find them attractive.

Here's some advice;

never turn your back on a dominant male turkey during mating season.

Everyone had their likes and dislikes. Obviously this is one of your likes.

Because it is exactly what you need?

What turns you on, is your business

Only you would know