About Phallus paintings in Bhutan

Phallus paintings in Bhutan are esoteric symbols, which have their origins in the Chimi Lhakhang monastery near Punakha, the former capital of Bhutan. The village monastery was built in honour of Lama Drukpa Kunley who lived in the 15-16th century and who was popularly known as the "Mad Saint" (nyönpa) or “Divine Madman” for his unorthodox ways of teaching, which amounted to being bizarre and shocking. These explicit paintings have become embarrassing to many of the countries’ urbanites, and this form of folk culture is informally discouraged in urban centers as modern western Abrahamic cultural norms of shaming the human body and sexuality have spread in Bhutan's urban centers.
A Thai Dhamma wheel at Wat Phothivihan, Tumpat, Kelantan

Buddhist symbolism – From representation to auspiciousness

is the use of to represent certain aspects of the Buddha's (teaching). Early Buddhist symbols which remain important today include the Dharma wheel, the Indian lotus, the three jewels and the Bodhi tree. Anthropomorphic symbolism depicting the Buddha (as well as other figures) became very popular around the first century CE with the arts of Mathura and the Greco-Buddhist art of Gandhara. New symbols continued to develop into the medieval period, .