turn-on
/ˈtɜːnɒn/noun
1
- usu. in sing. informal a person or thing that causes someone to feel excited or sexually aroused〈非正式〉令人兴奋的人（或物）; 引起性欲的人（或物）：
tight jeans are a real turn-on.
紧身牛仔裤真的很诱惑人。
2
- an instance of turning or switching something on打开。