What Can I Do To Keep My Relationship’s Spark Alive?

i would like to start this off by saying that my relationship is not currently losing it’s spark — fingers crossed it stays this way. ( ˶´ ᵕ `˶ )

i [23F] am asking for advice to prepare for when we go through that inevitable fighting phase — every relationship has one! — and the possibility of our love life becoming repetitive, tasteless, or boring. i want to find ways to keep my partner [22M] on his toes in a fun, mischievous, sexy sorta way. any advice would be greatly appreciated. thank you.~ ۶ৎ ₊˚⊹♡