Instructions
Earn at least 2,500 "renown points" by taking on and accomplishing missions as well as encountering and engaging other characters within the game. You can pay a bard to sing a song about you, show one of your trophies to townspeople or accept and complete a quest. After earning the necessary points, the kiss expression will be added to your "expressions menu."
Find a person within the game you want to kiss, and select the expression from the menu to blow a kiss. The kiss can have a large or little effect depending on who it is directed at. It could result in true love, a temporary spell or make the recipient angry and annoyed.
Buy a kiss expression from a random bookstore if you do not want to wait to earn the renown points. A downside from this approach is that a kiss expression can be difficult to find and expensive to purchase.