Adrenaline is like an aphrodisiac in relationships, especially when you’ve been together for years. It’s what infuses some oomph into otherwise ordinary days. “Sometimes things can start to feel stale and predictable in a long-term relationship,” says Seth Meyers, PsyD, author of Dr. Seth's Love Prescription: Overcome Relationship Repetition Syndrome and Find the Love You Deserve. “So make sure that you are stimulating your body, which, in turn, stimulates your mind and your emotions.” Give bungee jumping a go if you dare. Too extreme? How about horseback riding or go-karting? Or choose any other activity that you find exciting and gets your adrenaline going.