Well........I did make the offer once and it was accepted. Now understand....I had a stroke, at a young age and while I have few side effects left, balance is an issue for me and standing on a bus is a bad idea for me. I have done it, but try to avoid it. We were on a very crowded bus, DS and DH were standing and I was sitting with little DS, then 5, on one knee. We were heading back to CSR from MK. There was a mom and a little girl about 5 standing right beside us and we had started to talk a bit. The child was tired and I told the mom I was not able to give up my seat but she was welcome to sit on my other knee if she wanted and they accepted. I talked to the mom, and the child talked to my DS. Now I really do not know if I would accept any situations of an offer and I know that neither of my boys would have ever been ok doing that , but really in that situation, it did not feel weird or wrong and we made a friend.