The quote "As spread thighs are to the libertine...so was the letter V to young Stencil," from Thomas Pynchon's work, suggests a deep connection between desire and a symbol, in this case, the letter V. It implies that just as a libertine might be drawn towards sensual opportunities, young Stencil is captivated by the letter V, which represents something significant to him. This comparison may highlight themes of longing and obsession, emphasizing how certain symbols can evoke powerful emotions and desires within individuals.

This metaphor also reflects the broader themes often explored in Pynchon's writing, where seemingly simple elements can hold profound meanings and contribute to the characters' journeys. The allure of the letter V for Stencil might hint at a quest for understanding or identity, indicating that the pursuit of knowledge or connection can be as consuming as physical desire. Through this comparison, Pynchon invites readers to consider the complexity of symbols and their impacts on human relationships and motivations.