How can bugs get in a casket after burial?

Bugs can enter a casket after burial through various means, primarily by exploiting small openings or gaps in the casket's materials. Decomposing organic matter can attract insects, which may burrow in to access the body. Additionally, environmental factors such as soil movement, erosion, or the decay of the casket itself can create pathways for pests. Over time, the breakdown of materials can facilitate entry, allowing insects to infest the casket.