She rarely fraternizes with coworkers outside of work to maintain professional boundaries.

Despite the strict rules, the soldiers fraternized with the locals during the lull in fighting.

The manager warned the interns about fraternizing with clients after hours.

My fraternal nephew loves to help me in the garden on weekends.

When I visit, my fraternal niece always insists on showing me her latest drawings.

My fraternal nieces visited for the weekend and helped me in the garden.

My fraternal nephews often argue about which sports team to support.

The company's policy strictly prohibits sexual fraternization between supervisors and subordinates to prevent conflicts of interest.

Some scientists propose that the fraternal birth-order effect may be an alternative explanation for certain patterns of male sexual orientation.

Several researchers have studied the fraternal birth order effect to understand its implications for sexual orientation.