Do people WANT their signifigant other to be jealous?

It seems like sometimes people get a bit of satisfaction knowing that his or her significant gets jealous, as long as it doesn’t become excessive. Am I right about this?

For example, when my girlfriend studied abroad we usually only got to talk on Skype, and when she would tell me she was going out that night, I’d simply say have fun, have a good time, etc. She would often follow that up with “Are you worried?” or “Are you okay with that?”

I thought that was a little strange. She would say things like that, and it made it seem like she almost WANTED me to be jealous or not okay with it.

Thoughts? Normal?