play the field idiom
兴趣广泛;（尤指）乱搞男女关系，滥交情人
to hold an interest in a number of people or things, especially to become romantically or sexually involved with a number of partners
Becky's not ready to settle down with one man - she enjoys playing the field too much. 贝姬不愿意专情于某一个男人——她太喜欢同时和几个人谈情说爱了。