turned on at work

So like there is a guy that I work with and lately our flirting has been brought to the next level in a way out of no where. So one day (a while ago) he pulled on my braid to be immature and he realized that I liked it and he has been finding out I'm not as innocent as I seemed to be. Lol. He knows I like dirty stuff. So while working he yanks my hair hard, refers to sex in a way, bites me , goes after me in cute but kinky ways and the past two days he has been making moves to touch my boobs or ass now 😂😅 I love it but it seems really like... weird? But out of it all, he cares for me. I didn't have a ride the other night and he wouldn't leave without making sure I found someone since I denied a ride from him. What do you guys think? Is this normal? Do you encounter a coworker like this?