She has sexual relations with her partner.

They had sexual relations last night.

He was diagnosed with AIDS-related complex.

Many patients with AIDS-related complexes experience various symptoms.

The hotel has hired several guest relation officers to assist guests with their needs.

The small ubiquitin-related modifier (SUMO) protein plays a crucial role in regulating protein function.

The small ubiquitin-related modifiers play a crucial role in protein modification.

Gay-related immune deficiency is a term used to describe a group of symptoms and infections that occur in people with weakened immune systems, particularly those who are gay or bisexual.