彼は浮気な性格で、趣味が次々に変わる。
He has a fickle nature, and his hobbies change one after another.
いつもの店をやめて、たまには別の喫茶店に浮気してみた。
For once I strayed from my usual place and tried a different café.
客の浮気を防ぐために、店はポイント制度を始めた。
The shop started a points scheme to keep customers from straying to competitors.
あれこれ浮気をせずに、一冊の参考書をやり通しなさい。
Don't flit from one thing to another; work through a single study guide to the end.