Yes, I have.
Great fun for me but a punishment for him.
My best friend came to visit one day and he had been eating Curry and was farting and burping noxious Garlic and other spices fumes and thought it was hillarious.
I was heaving and had to sit in my bedroom after he had left as the stench was so bad in my Living area.
The following Day, I visited his place an hour or so before his wife and Son came home.
I took my Enema Bag and told him I was going to flush him out and get rid of the Rat that had crawled up his arse and died.
This friend knows I am Gay but I have never laid a finger or made a sexual move on him.
He took the Enemas with great difficulty, Effing and Cursing and was so embarrassed and his face glowed crimson and you could have fried an egg on it.
He didnt get an Erection and I had no intention in purposely giving him one but I have never seen a Guy produce as much Pre cum in my life as he did
I left of course before his family returned and an hour or two later decided to call him.
His wife answered and said he couldn't come to the phone as he had spent the best part of an hour in the Loo!.
This was before Christmas and although we have never mentioned Enema's since,he knows the consequences.