Homosexuality is a scientific term developed in the late 19th century to describe the new recognition of a particular group of people who have an inborn physical and emotional attraction to peers of their own gender instead of the opposite gender. The term heterosexuality, describing people attracted to the opposite gender, originated at the same time. Human sexuality is a complex issue and involves much more than just to whom one is attracted; it is an integral part of one’s personality and way of seeing and relating to life and other human beings.
Homosexuality ni jina la kisayansi lililoundwa mwishoni mwa karne ya kumi na tisa, ili kufafanua kundila kipekee lililoimbuka la watu wanaovutiwa kimwili na pia kiakili kwa watu wa jinsia zao, aidha, waume kwa waume na wake kwa wake. Tamko, heterosexual, watu wanaovutiwa kimapenzi kwa watu wa jinsia kinyume, pia liliundwa wakati huo huo. Ujinsia wa binadamu ni swala tatanishi, ambalo hueleza zaidi ya jinsia avutwayo kwayo binadamu kimapenzi; ni sehemu muhimu ya ubinafsi wa mhusika na huchangia vikubwa anavyoya-chukulia maisha yake na vilevile, anavyotangamana na binadamu wengine.