Very briefly my SIL has a DS three weeks younger than my DD. They play together often and last week she brought DS over and we spent a lovely day in my garden. Both kids are just over 2 and potty training "ish", her DS has been much quicker to pick it up than DD who is just not ready. The two kids ran round the garden, him naked, DD in nappy and t shirt. I had provided a potty, but when it looked like her DS needed a wee she encouraged him to "water the grass" and three time he purposfully peed on my lawn, laughing as he did it. Now I know there may be accidents and that doesn't bother me, but I do think it's a bit gross and anti social to actually encourage him to do it......am I being unreasonable?