cannotspreadthedisease.Thebestwaystoavoidthevirusarenottoshareneedlesandpracticesafe-sex.Practicingsafe-sexmeansusinganew，cleancondomeverytime.
15.Whydogaysandlesbiansflaunttheirsexuality？
Aperson’ssexualityorsexualorientationispartoftheiridentity.Whilenotallgaysandlesbianschooseto“comeout”ormaketheirsexualorientationpublic，manydoandchoosetopubliclyexhibitprideinthispartoftheiridentity.Theymightdothisbyholdinghandsinpublic，marchingingayprideparades，orevensimplytalkingabouttheirpartnersorrelationships.Forgaymenandwomenthisisawaytoavoidbeingperceivedasheterosexualandtoliveanhonestlife.Everyoneseekstofreelyexpressthemselvesinsomeway，andmostgaypeopledosowithoutstraightpeopleevernoticing.Manygaymenandwomenmayalsomaketheirsexualitypublictoincreasetoleranceandawarenessaboutgayissues.
16.Ishomosexualityimmoral？
Whetherhomosexualityisimmoralwillcertainlydependonwhooneasks，butitisclearthatinthelastseveraldecadesmoreandmorepeoplebelievethatitismorallyacceptable.RecentpollsalsoshowthattherearesignificantdifferencesofopiniononthisissuebetweenAmericansdependingontheirage，location，politicalaffiliation，andreligiousbeliefs.Becauseattitudeshavediffered，itwouldbewrongtosaythathomosexualityhasorisgenerallyoralwaysregardedasimmoral.Manyscholarsandofficialsaroundtheworldhavenotedthatviewsonthemoralityofhomosexualityarechangingforthebetter，muchinthesamewaythatthebeliefthatinterracialmarriagewasimmoralchangedmarkedlyoverthecourseofthe20thcentury.