They offer their wives to visitors for sex
Under this practice, known as “Okujepisa Omakazendu” which means “offering wife to guest”, a Himba man in his quest to please a friend or an esteemed guest, allows his wife to sleep with his guest for the night.
While his wife and guest are at their normal business, the man is mandated to sleep in another hut. In the absence of a hut, he sleeps outside.