Yes, happens quite often.

I feel as if it's more so the 'aura' that these kinds of girls give off.
For whatever reason, our biological instincts kick in, and to my own personal experience, the majority of the time in these situations the girl feels the same way about you that you do about her. It's like the universe/biology is forwarding you to smash each other.

My advise.... if she makes your dikk hard, then smash.

im a sex addict (legitimately) and i get that feeling anytime i see a girl with dat ass. The nicer the ass, the less i care about face. Surprisingly im more ready to pounce on the average with ass than hot with ass. Mostly because i have a preconceived notion that hot girls are egotistical bitches and average girls are normal and down to earth, and can get freaky when the time calls.

This is probably it.
She has genes that compliment your genes. Your kids would probably be amazing.

I remember one time in high school, me and a couple of my friends went to this girl's house, and her big primal beast looking sister comes running out with just a shirt and her panties, and that view of her bare legs to her vagina area just had me harder than a rock. The primal instinct kicked in so fuking hard, I literally went up to her and started flirting with her with like no fuks given. The sexual aura was unreal, we were gonna fuk within the next hour, it was gonna happen, we both just felt it, it was going down, but some other girl there got my friend mad so it didn't happen. Luckily for me I ended up smashing a different and better looking chick that same night.

Yeah definitely.

Also sometimes I will have a dream about a random girl that I haven't thought about in a while, or ever been intensely attracted too but after the dream I can't get her off my mind.

Some women you can just tell are wild in the bedroom, and even though they may not be that attractive, you just want to have a really great night of sex instead of just average sex with a more attractive woman. Plus, you can do things you wouldn't normally do since you don't care because you are not going to have a relationship with them.

^this
Was this girl acting slutty? That always works for me, lol

there's this 40-50 lady at work that I wanna bang so bad. (she's asian so she looks good still) but it's weird indeed..

Usually has to do with a soft effortless almost playful femininity that they exude. Some girls just have that.

You came face to face with a women your own league (srs)

pheromones boyo

strong compatibility

I think I do this nearly every day at some point. See at least, not meet.