Since the 1960s and 1970s, a large body of research has provided evidence and analysis of the extent to which heterosexuality and homosexuality are socially organized and historically changing.
Semenjak tahun 1960an dan 1970an, sejumlah besar penelitian telah memberikan bukti dan analisa secara meluas sehingga heteroseksualitas dan homoseksualitas dapat ditata secara sosial dan mengalami perubahan sejarah.