NSFW anatomy question: is the foreskin supposed to retract all the way when erect?

I really feel like I can ask anything now, so I know this question is embarrassing and weird, but please be serious and helpful.

For those uncircumcised folks out there, I was wondering: is the foreskin supposed to retract all the way when a person is erect?

I seem to have gotten that impression lately from some things I’ve read and well, that’s not quite what happens with me…

Am I supposed to do something about it?