 People of the Seven Kingdoms call the Summer Islanders' great vessels "swan ships", "for their billowing white sails and for their figureheads, most of which depicted birds".Samwell Tarly, who spends two chapters in "A Feast for Crows" aboard a swan ship, describes the Summer Islander women as wanton, and their gods as strange; they "revered the elderly and celebrated their dead" through sexual intercourse.As a prostitute explains to Tyrion in "A Clash of Kings", the Summer Islanders regard their sexuality as the gods' gift to worship them through mating, and hence many of their highborn youths and maidens serve in pleasure houses for a few years to honor the gods.