My 2 eldest, a 20yr old boy and a 26yr old girl came round for Sunday dinner and my lad decided to tell his sister about his weekend of fun he had and I got dragged into it the conversation for my "opinion" about anal sex and my lad decided to say "how do you know?". So I dropped it on them both that not only have I tried it but I liked it. First come the laughing until they realised i wasn't joking and then came the shocked looks and the questions which I answered openly. My girl took it quite well but just had to have another chat with my lad as he claims "i fried his brains" with my confessions lol. I haven't confessed everything and I don't think I will for a while now until he's a bit older and more "experienced" to understand the "why" as he put it.