To me, that's about making that feeling last.

Jesse Pinkman: You know, I don't get it. Why would anyone paint a picture of a door, over and over again, like, dozens of times?
Jane Margolis: But it wasn't the same.
Jesse Pinkman: Yeah, it was.
Jane Margolis: It was the same subject, but it was different every time. The light was different, her mood was different. She saw something new every time she painted it.
Jesse Pinkman: And that's not psycho to you?
Jane Margolis: Well, then why should we do anything more than once? Should I just smoke this one cigarette? Maybe we should only have sex once, if it's the same thing.
Jesse Pinkman: ...no.
Jane Margolis: Should we just watch one sunset? Or live just one day? Because it's new every time. Each time is a different experience.
Jesse Pinkman: Okay, fine. I guess the cow skull pictures were cool, but a door? I will say it again. A door.
Jane Margolis: Why not a door? Sometimes you get fixated on something, and you might not even get why. You open yourself up and go with the flow, wherever the universe takes you.
Jesse Pinkman: Okay, so the universe took her to a door. And she got all obesessed with it, and just had to paint it 20 times until it was perfect.
Jane Margolis: No. I wouldn't say that. Nothing's perfect.
Jesse Pinkman: Yeah? Well, I mean,
[looking to her]
Jesse Pinkman: some things.
Jane Margolis: Aww, that was so sweet, I think I threw up in my mouth a little bit.
Jesse Pinkman: You can't admit, just for once, that I'm right. Come on. That O'Keeffe lady kept trying over and over until that stupid door was perfect.
Jane Margolis: No. That door was her home and she loved it. To me, that's about making that feeling last.