have a thing

have a thing about/ for sb or sth：对……反应强烈; 对...有强烈的情感或爱恋；
对……有强烈的好感;非常喜欢(have a liking for sth or fall for sb.)
1)I definitely have a thing for her.

我肯定对她有感觉。

2) Adults have a thing about spiders.

成人总是对蜘蛛有偏见。

3) I always have a thing for cowboys.

我总是很迷牛仔。

4) Tony used to have a thing for his deskmate in high school. 

托尼上中学的时候对他的同桌有好感。

5) My wife seems to have a thing about Barbie dolls.

我太太似乎很喜欢芭比娃娃。
6) John has a thing for Jane, so he tries all means possible to hit on her. 
约翰对简怀有爱恋之情，所以他尽一切可能去撩逗她。