Mixed Emotions

Did you know that researchers debate about mixed emotions (e.g., happy and sad about something)? You know you feel both together about some topics...that's a no brainer. It's how it happens - truely together or flip flopping. Can you truely feel happy and sad at the same time? Or, is it that you switch between the two and not truely feel them simlutaneously...even if it's between seconds that the flip occurs? For example, watching the little mermaid (don't laugh, they use this for rearch :)...when Ariel becomes human - you're happy for her because she gets the guy, but sad for her also because she leaves daddy. But is it truely at the same, exact time?
I think I solved the problem. I think I can prove, once and for all, that emotions are truely simultaneous. I both love and hate Billy Blanks (Tae Bo) right about now. Truely simultaneously :)