In sex, it is feeling or experiencing
sexual feelings or attractions towards
someone or something.
In sport, it is the intensity of
motivation and excitement experienced while engaging in training or participating in sport.
Example One - Sex:
His arousal towards his
girlfriend made him further want to make love with her.
Example Two - Sex:
The arousal he felt after watching the
pornography made him want to watch more.
Example One - Sport
The footballers' arousal levels were increasing as the match
played on, making them further motivated to play well and put more effort in.