From the instant The Last Song producer Adam Shankman began filming, he knew that stars Miley Cyrus and Liam Hemsworth were great together. Shankman told People that on the first day of shooting, Cyrus and Hemsworth kissed for the first time, and he and his co-producer Jennifer Gibgot could tell that the two had amazing chemistry. Now the two actors are engaged, meaning that their on-screen chemistry was real. This comes from not only their similar values, but their very different personalities, Shankman claims. “I’ll tell you what’s so great,” he said. “That thing about opposites attract.”

What are some things that a kiss can tell you about a potential relationship?

Cupid’s Advice:

It’s been scientifically proven: kissing is a biological way for people to tell whether or not someone will make a good mate. However, even if you don’t use the specifics of science, you can still tell a lot about the state of your relationship based on how you and your partner kiss. Here are some things to look for:

1. Responsibility: When you kiss your partner, it’s easy to check for things like bad breath, lip moisture and the presence of food. A person who takes good care of their mouth before kissing is likely to be attentive and accountable in other areas as well, while someone who is sloppy and messy often will be lacking responsibility elsewhere.

2. Nervousness: Does your partner kiss you with confidence and poise, or are they shaky and uncertain? A nervous kisser may be nervous about other aspects of your relationship.

3. How you feel afterwards: Don’t discount your feelings, even if you’re unsure of where they come from. If you feel happy and passionate after a kiss, chances are your relationship is going well. However, if you wind up confused or concerned, it’s likely that you’ll have a lot to consider about where you and your partner stand.

What do you think kisses can tell you about relationships?  Tell us below!