The present invention relates to cosmetic compositions that comprise: a) a
safe and effective amount of a three membered functional cyclic bonding
agent having the structure
##STR1##
wherein X represents a cosmetic benefit agent that may or may not be
attached to a chemical linker and Y represents O, NH, S, or Se; and b) a
cosmetically acceptable carrier for the bonding agent wherein the
composition is administered topically to mammalian proteinaceous
substrates and wherein the bonding agent reacts with a protein contained
in the substrate such that the bonding agent, and thus the cosmetic
benefit agent, is covalently attached to the substrate. The invention
further relates to methods of using the compositions described above as
well as various products that include the claimed compositions.