There's no hard and fast rule for doing it, but yes, it is known to be beneficial and that's why is preferred.
Zwi ya konḓa u tou i wana nga mulandu wa u fhambana ha mivhala nga zwo ina heḽi dzina, naho zwo ralo ndi yone ine ya vha uri yo ḓowelesea nga maanḓa na hone i ya wanalesa.