In 2000 Monica Sex decided to re-group and make their second album Open Relations (Hebrew: יחסים פתוחים, Yahasim Ptuchim).

With the organist Eldad Guetta playing on the album and later joining the band, they recorded 12 new songs, mostly written by Sobol.

In the past he was in the Israeli-British art rock band Blackfield with Geffen and Porcupine Tree leader Steven Wilson.

Efrati appears on stage regularly in his native country, and has appeared on many Israeli pop and rock recordings, including records by Geffen, Hemi Rudner, Ninette Tayeb, Daniel Salomon, Ram Orion and numerous alternative rock Tel Aviv bands.

In 2008, Efrati co-starred in the mini-series "Ta'ase li Yeled" (Hebrew: תעשה לי ילד), directed by Yuval Schafferman for Israeli channel HOT3.