Ucansi (noma i-coitus noma ukuhlangana ocansini) isenzo socansi esibandakanya ukufaka nokufaka ipipi esithweni sangasese ngenjabulo yezocansi, ukuzalwa kabusha, noma kokubili. Lokhu kwaziwa nangokuthi ubulili besitho sangasese sowesifazane noma sangasese. Ezinye izinhlobo zocansi lwendunu zifaka phakathi ucansi lwendunu (ukungena ngendunu), ucansi lomlomo (ucansi lomlomo noma lwendunu), ukungena komunwe (ukugcwala ngomunwe) nokungena. ngokusebenzisa i-dildo (ikakhulukazi i-strap-on dildo). Le misebenzi ifaka ukusondelana ngokomzimba phakathi kwabantu ababili noma ngaphezulu futhi imvamisa isetshenziswa kuphela ngabantu ukujabulisa umzimba noma imizwa futhi ingaba nomthelela ebunyeni babantu. Bona futhi: Umsebenzi wezocansi womuntu kanye nobulili bomuntu Izincazelo Ukuya ocansini kungabizwa ngokuthi yi-coitus, copulation, coition, noma ukuya ocansini. ICoitus isuselwa egameni lesiLatini elithi coitio noma coire, okusho ukuthi "ukuhlangana ndawonye noma ukuhlangana ndawonye" noma "ukuhamba ndawonye", futhi kwaziwa ngaphansi kwamagama esiLatini asendulo ahlukahlukene ngezenzo ezahlukahlukene zocansi, kepha imvamisa kuchaza ukungena kwepenile-kwesitho sangasese sowesifazane. Lokhu kuvame ukubizwa ngokuthi ucansi lwesitho sangasese sowesifazane noma ucansi lwesitho sangasese sowesifazane. Ubulili besitho sangasese sowesifazane, futhi okungajwayelekile ocansini lwesitho sangasese sowesifazane, nakho kungakhombisa noma yimuphi umsebenzi wobulili besifazane, ikakhulukazi uma ungena ngaphakathi, kufaka phakathi ezocansi phakathi kwezithandani ezithandanayo.