71% of 18-44 year olds are in marriage or informal relationships. Median lifetime serious relationships is 2. Partners most often met at private parties, friends' meetings, school, university, or work. Gen Z relies more on dating apps and internet. Millennials favor clubs and bars more. Number of close friends ranges from 0 to 11+. More social media time correlates with fewer close friends. Most meet friends outside work/school weekly or less. Mental health self-rated mostly good or average. Face-to-face contact common with parents and partners, messaging with friends and bosses. Relationship status varies by gender and politics. Lifetime sexual partners range 0 to over 10. Most had sex in last 12 months, especially older groups. 18-24 year olds' recent sex varies by gender and left-right politics. Top relationship priorities are emotional security, good character, shared values, and calm. Physical attractiveness and finances rank lower in partner priorities. Bisexual and homosexual orientations reported alongside heterosexual majority.