17. Start Kissing
The beginning of a relationship is full of kissing — stolen kisses at red lights, long kisses goodbye at door stoops, heated makeout sessions on couches as a movie plays on forgotten in the background. While it's normal for that wild spark of passion to simmer down to a low burning heat, you want to make sure it doesn't snuff out. So remember to kiss — and not just a chaste peck before you head off to work. Turn that peck into a long smooch with a butt grab, kiss again at the end of a date, steal kisses when you two are cooking in the kitchen, or be present when you kiss them hello and put your emotions into it. It will bring that fire back.