There are several reasons why people may choose to use lubricant during sexual activities:

1. Comfort: Lubricant can reduce friction and discomfort during sexual activities, making them more comfortable and enjoyable.
2. Pleasure: Lubricant can enhance the sensations experienced during sexual activities, making them more pleasurable.
3. Safety: Lubricant can reduce the risk of tearing, chafing, and other types of injury that can occur due to friction during sexual activities.
4. Medical reasons: Some medical conditions, medications, or hormonal changes can affect a person's natural lubrication, making it difficult to engage in sexual activities without experiencing discomfort or pain. In such cases, lubricant can be helpful.
5. Enhancing sex toy play: Lubricant can help make the use of sex toys, especially larger ones, more comfortable and pleasurable. It can also help prevent damage to the toys and prolong their lifespan.

Overall, using lubricant can help make sexual activities more enjoyable, comfortable, and safe for everyone involved.