sex act

sexual intercourse 性交.

seventy, seventy-eight, sever, several, severally, severance, severance pay, severe, severely, severity, sew, sewage, sewage farm, sewage works, sewer, sewerage, sewing, sewing-machine, sewn, sex, sex appeal, sex life, sex-, sex-starved, sexagenarian, sexily, sexiness, sexism, sexist, sexless, sexologist, sexology, sextant, sextet (also sextette), sexton, sexual, sexual intercourse (also intercourse), sexuality, sexually, sexy,