What is common to both sexes is that "the first time" has a meaning involving a change of status in relation to oneself and the group. It represents a leap for the adolescent into the group to which they aspire to belong: that of adults or the initiated.
Lo común en ambos sexos es que "la primera vez" tenga un significado de cambio de estatus respecto a uno mismo y al grupo, significa un salto para el adolescente al grupo al que aspiraba pertenecer: al de los mayores o iniciados.