Cooking oil is great. It washes off ok with lots of shampoo. And it feels amazing. I have used it wearing briefs and just upended a 2 litre bottle over my head. It feels sensational. try it.
I also prefer coconut oil . It's melting above around 30 degrees Celsius so it stays liquid as long as it's at (or in ) the body. You should only use plant-based sorts of oil. It does no harm to all skins and won't destroy condoms or silicone/latex toys. To clean up oiled hair easy: Do NOT use water to start the cleaning!!! First use plenty of Shampoo and wash the hair as long as Shampoo and Oil mixed to a creamy, white Solution. The solution is Water soluble now. Have fun and watch your health!
Oil is great, it feels amazing to write around in it and it's a great lube!
Couple of tips, whatever you wear will get trashed. So maybe not your brand new DFB kit! To clean up i found it best to wipe the thick off with kitchen towel and then use washing up liquid, it's drying so you need to use a moisturiser after or an emollient like aqueous cream, but that can be fun too...