Primatews Uganda on Instagram: "While a male lion's grunt might sound intense, it is often a normal part of his "social toolkit" or a natural physical response. Grunting continuously while lying down is an Expression of Comfort, Similar to a domestic cat's purr. Lions use low grunts or "hums" to signal contentment while resting or grooming with other pride members. BOOK A 5-DAY GLIMPSE OF KENYA WILDLIFE SAFARI! This Safari takes you on a great journey through 3 of the best wildlife destinations.