Arousal in a dream is read as desire and vitality, not always for a person. It often points to excitement about an idea, a goal or a part of life that feels newly alive.
Where in your waking life have you met something like this lately?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.