relaciones sexuales (fpl)
n.
love making, sexual intercourse
relaciones sexuales
(n.) = sexual intercourse, intercourse
Ex: These findings suggest that children are knowledgeable about the major means of transmitting the AIDS virus (sexual intercourse and the sharing of hypodermic needles). Ex: Findings showed that incest usually involved daughter-father and niece-uncle pairs, and for father-daughter relationships the incest always included intercourse.
relación sexual
(n.) = sexual relationship
Ex: McBee examines the ways in which immigrant women and men found new ways to define homosocial and heterosocial and sexual relationships in early-20th-century America.