Is this normal?

Of course it is but the key here is NOT to entertain those thoughts. Your brain is used to consuming a unhealthy amount of dopamine from PMO abuse over the years so it would naturally play scenes/clips/pictures of that content. It is normal in that way. Don't try to fight it or else you would end up exhausting yourself. Instead just acknowledge those thoughts, close your eyes ( start slow breathing in and out), rest all your muscles from head to toe and then wait for the urge to pass on it's own. Try this and eventually you will get used to it. Of course there are other ways and you will learn new ways of trying to control those thoughts/urges. We all have those thoughts so don't worry about it. All the best

 

No problem bro, keep strong

 

Assuming you're a young man, having a bunch of sexual thoughts is very normal.