KISSING is the key to a happy relationship, according to research from an online dating site.
Matchmaking website eHarmony found about a third of people in relationships needed one "proper kiss" a day to feel satisfied in their relationship.
Body language and kissing expert Katia Loisel said kissing boosted oxytocin levels and cut stress.
"Therefore, couples who kiss frequently are also more likely to feel happy and connected as well as experiencing additional benefits from increased touch, eye contact and intimacy.
It is such a small action that can reap big rewards for couples," she said.
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