Cosmetic use of a cosmetic composition comprising a cosmetically acceptable carrier, preferably water, a polyorganosiloxane and optionally a surfactant, and an ampholytic copolymer comprising cationic units (c) and units (a) which are anionic or able to be anionic, characterized in that: - the polymer comprises: - 0.1 to 50% by number of units (c), derived from the polymerization of at least one monomeric compound (c) of general formula I: in which: - R 1 is a hydrogen atom or a methyl or ethyl group; - R 2, R 3, R 4, R 5 and R 6, which are identical or different, are linear or branched C 1 -C 6, preferably C 1 -C 4, alkyl, hydroxyalkyl or aminoalkyl groups, - m is an integer from 0 to 10, preferably from 0 to 2; - n is an integer from 1 to 6, preferably from 2 to 4; - Z represents a -C O- or -C NH- group or an oxygen atom; - A represents a (CH 2) p group, p being an integer from 1 to 6, preferably from 2 to 4; - B represents a linear or branched C 2 -C 12, advantageously C 3 -C 6, polymethylene chain, optionally interrupted by one or more heteroatoms or heterogroups, especially O or NH, and optionally substituted by one or more hydroxyl or amino groups, preferably hydroxyl; - X -, which are identical or different, represent counterions; - units (a) derived from the polymerization of at least one hydrophilic monomer (a) bearing a function with acidic character, copolymerizable with (c), which is anionic or able to be anionic, - optionally, units (n) derived from at least one monomer (n) containing an ethylenic unsaturation, of neutral charge, copolymerizable with (c) and (a), preferably a monomeric hydrophilic compound containing an ethylenic unsaturation of neutral charge bearing one or more hydrophilic groups, copolymerizable with (c) and (a), - the amount of units (a) and optionally (n) being from 50 to 99.9% by number, - the pH of the composition is from 3.5 to less than 5.5, preferably between 4.5 and less than 5.5, preferably from 5 to less than 5.5, - the proportion by weight of surfactant in the composition is between 0 and 30%, preferably between 5 and 30% by weight, the surfactant comprising an anionic, nonionic, cationic or amphoteric surfactant, preferably anionic or cationic, optionally with an amphoteric surfactant, - the proportion by weight of the copolymer in the composition is between 0.01 and 5%, preferably between 0.05 and 1.5%, preferably from 0.1 to 0.3%. - the polymer comprises: - 0.1 to 50% by number of units (c), derived from the polymerization of at least one monomeric compound (c) of general formula I: in which: - R 1 is a hydrogen atom or a methyl or ethyl group; - R 2, R 3, R 4, R 5 and R 6, which are identical or different, are linear or branched C 1 -C 6, preferably C 1 -C 4, alkyl, hydroxyalkyl or aminoalkyl groups, - m is an integer from 0 to 10, preferably from 0 to 2; - n is an integer from 1 to 6, preferably from 2 to 4; - Z represents a -C O- or -C NH- group or an oxygen atom; - A represents a (CH 2) p group, p being an integer from 1 to 6, preferably from 2 to 4; - B represents a linear or branched C 2 -C 12, advantageously C 3 -C 6, polymethylene chain, optionally interrupted by one or more heteroatoms or heterogroups, especially O or NH, and optionally substituted by one or more hydroxyl or amino groups, preferably hydroxyl; - X -, which are identical or different, represent counterions; - units (a) derived from the polymerization of at least one hydrophilic monomer (a) bearing a function with acidic character, copolymerizable with (c), which is anionic or able to be anionic, - optionally, units (n) derived from at least one monomer (n) containing an ethylenic unsaturation, of neutral charge, copolymerizable with (c) and (a), preferably a monomeric hydrophilic compound containing an ethylenic unsaturation of neutral charge bearing one or more hydrophilic groups, copolymerizable with (c) and (a), - the amount of units (a) and optionally (n) being from 50 to 99.9% by number, - the pH of the composition is from 3.5 to less than 5.5, preferably between 4.5 and less than 5.5, preferably from 5 to less than 5.5, - the proportion by weight of surfactant in the composition is between 0 and 30%, preferably between 5 and 30% by weight, the surfactant comprising an anionic, nonionic, cationic or amphoteric surfactant, preferably anionic or cationic, optionally with an amphoteric surfactant, - the proportion by weight of the copolymer in the composition is between 0.01 and 5%, preferably between 0.05 and 1.5%, preferably from 0.1 to 0.3%.