Is it normal? frustrated by sex, fantasize about fellatio

I'm 24, straight white female, my last boyfriend dumped me when I moved to a new city; after I got over it, I slept with a few people I didn't know well (typical for me when between boyfriends), then I had a brief tryst with a 40-year-old black man. Basically, it was the most incredible sex of my entire fucking life (ever heard of rolling orgasms?), but personally, I couldn't stand him--he had a lot of annoying habits (humming, etc), didn't have anything thoughtful to say, and he was creepily cloying after not knowing me at all. I met him on a business trip to DC and he came to visit me in the midwest (sounds like a bad plan I know). He did some condescending shit and I kicked him out two days early and he was even creepier, forcibly hugged me and smelled my hair while crying.

SO--most amazing sex of my entire life, but the dude irritated me and creeped me out. I haven't dated or had sex since, and it's been six months.

Now I only fantasize about blowing men. I don't want a relationship, to be specific, I have an older, hard-working coworker that I would like to suck off... In his office, after a long, hard day...

But it's not just him. Instead of thinking about penetrative sex, I only think about performing oral sex. I think it has something to do with having glorious sex with a huge dick attached to someone I couldn't stand.

Does this seem healthy/normal to you?