A wet skin moisturizer (WSM) composition, in the form of an oil-in-water emulsion, contains the following components: a cationic emulsifier (such as behentrimonium chloride), a skin conditioner component (such as behenamidopropyl dimethylamine), and a block copolymer which comprises at least one segment derived from a thermoplastic monomer chosen from thermoplastic monomers, thermoplastic comonomers and mixtures thereof (such as a mixture of ethylene/propylene/styrene copolymer and butylene/ethylene/styrene copolymer). This composition is applied to previously-wetted skin following a shower or bath, after which the moisturized skin is dried. The composition blends nicely with the water on the skin to provide an even film that does not feel greasy on the skin and which provides the skin with hydration and skin conditioning benefits.