Kenapa nk bina satu hubungan tu perlu ada chemistry? Sebab mula2 kita kena form aura iaitu “intermolecular forces”. So masa ni depend pd kesesuaian masing-masing. Nak form hydrogen bond,cation-anion interaction,vanderwaals or even dipole-dipole moments depends pd jantina,pangkat,umur dan lifestyle. Lpas tu, bila nk kuatkan bond tu kena form “covalent bond” utk sama jantina or “ionic bond” utk jantina berbeza. This strong bond akan form bila share “electrons” a.k.a effort.