Ds and his friend (little girl who lives next door) often run between the houses, they're great friends and I think it's lovely. I usually check on them every 15 or so if they've been particularly quiet (not that often!) Yesterday I hadn't heard anything for a few minutes yesterday so I went upstairs and checked on them, the friend came out of ds's bedroom wearing just a tee shirt (no trousers or pants) and ds came out after her. I was quite surprised to see her like that so I breezily said "oh dear, what happened to your trousers?" and ds said we were playing doctors. I checked her front bottom and her back bottom.
Not wanting to make a big fuss or anything I said "oh" and asked the friend if she was ok. She was fine, didn't seem upset or anything so I let it pass. Later on I mentioned it again to ds and said to him that he shouldn't take little girls clothes off if they don't want to, and that sometimes people don't like other people looking at their bottoms.
Was that the right way to deal with it? I didn't want to make a huge scene out of it incase it freaks them both out. He's 3.11 and she's 2.10.