Is it normal i get so turned on just thinking about him?

I met this guy about seven months ago and we immediately clicked and I developed a huge crush on him. I used to fantasise about him everyday.
We have recently started seeing each other and I keep having flashbacks of us having sex. Every time I think about it I get a wide on and feel so horny. I feel so turned on.
I've slept with a lot of people in the past and I've had two relationships, but I have never felt this way. I haven't felt so horny just remembering what it was like to have sex with someone before. My whole body feels electrified. Is this normal?