sowing his oats

Sowing his oats, which also might be said as sowing his wild oats, is when a person engages in certain behaviors which are not typical for him or her, frequently as if to try new things to gain experience. This phrase is most commonly used for someone who wants to get married but decides to be intimate with other people first as a way to sow his wild oats, because he wants the experience before no longer having the chance to do it.