This absurdity has to stop. Conflating a bean fetish with the well accepted medical practice of foreskin oiling is a clear and present danger to public health.
Generally you want oil without tannins and non-petroleum based for foreskin. If you make the mistake of buying oils with tannins it can irritate the skin after a few uses.
Generally the popular ones would be grapeseed oil, avacado oil, and coconut oil. Probably the best being coconut imho check allergies first. But I have a friend that swears by grapeseed too. So it can be of personal preference and genetic history.
I think in ancient Greece they used duck fat. And Northern Europeans used whale fat for a while. Whatever you do do not use lotion. Lots of people think that stuff works, but again petroleum based.
This is not medical advice. Ask your doctor, not some guy on the Internet.