I do not find taking an enema is a lot of fun. There are many other things I would rather do, so enemas are for my health and nothing else.
I could not find any info on the absorption of olive oil by the large intestines. From my observations I would say that very little oil is absorbed by the intestines. Also I would suggest taking a soapsuds enema after any oil enema to wash out all the oil. Hope this helps.