Cosmetic compositions which contain at least one conditioning agent selected from synthetic oils, mineral oils, plant oils, fluorinated or perfluorinated oils, natural or synthetic waxes, compounds of the ceramide type, carboxylic acid esters, silicones differing from the silicones of formulae (I), anionic polymers, nonionic polymers, cationic polymers, amphoteric polymers, cationic proteins, cationic protein hydrolysates, cationic interfacially active substances and mixtures thereof and at least one hydroxy-terminated organopolysiloxane of formula (I). The cosmetic compositions improve numerous properties of the body surfaces, in particular hair, treated therewith and, in addition to improved combability and improved handle, in particular lead to a reduction in the contact angle of the hair.