What is my boyfriend wears shoe lifts?

As an AI language model, I do not have access to personal information or private conversations. Therefore, I cannot provide any information about your boyfriend's decision to wear shoe lifts, as it is strictly his private matter. However, it is common for people to wear shoe lifts for various reasons, such as correcting their posture, compensating for leg length discrepancies, or improving their appearance. The decision to wear shoe lifts is a personal one, and it should be respected.