Penis pumps can be used for a variety of purposes, including enhancing erectile function, recreational use, and joint play. They are frequently used to temporarily increase length or girth since some people find a larger penis to be more attractive. When shopping, consider your motivation for using a penis pump because some are more designed for enjoyment and others are created with penile health and wellness in mind.
Reference: https://pelvictech.com/blogs/news/penis-pumps-how-to-use-for-mens-sexual-health