Temptation
Temptation is perhaps the most prominent theme throughout the book and appears at multiple points through Clyde in particular. For example, the lemon grove that Clyde loves so dearly can be compared to the Garden of Eden – a wonderful place where he feels in tune with himself and which he does not wish to ever leave. However, Fila can be compared to the apple, the temptation of the garden. Clyde wishes to drink her blood and refrains for most part but ultimately his blood lust takes over and he ends up killing her. Despite this, he is accepted back into the lemon grove/Eden by Magreb.
Identity
This is a secondary theme running throughout the short story. It is clear that Clyde is having an identity crisis. Initially, eh was a typical vampire who went on killing sprees and gave into his desires, but then he met Magreb and changed his ways. He came to depend on her too much over the years and indeed their identities became one. It was easy for Magreb to live life as normally as possible, and so Clyde convinced himself he could live normally too. However, his identity crisis came at the very last moment when he let his inhibitions go and ended up killing Fila, thus suggesting this is his true persona.