exhibitionism

He jumped into the lake, out of pure exhibitionism.

他跳进湖里, 完全是为了出风头.

She was embarrassed by his exhibitionism at the party.

他在聚会上竭力表现自己使她感到很难堪.

There is an element of exhibitionism in the parents' performance too.

那对父母的表现也显得有些爱出风头。