My sisters Ada has always did this. When i go to her house she pees/piddles when i pet her.
Diggy has only did this once before yesterday. When he played with the sheltie Daisy next door who he loves he rolled over on his back for her and peed on himself (so manly, Im so proud

) anyway, yesterday he piddled 3 times!!! 2 times when tannars friend Michale petted him and once when averys friend Brittany came over and petted him. What's up with this??
We also saw Bella sniffing his ding ding a few times which she normally doesnt do and he has been "cleaning it" more than usual also.
He was a year old in March and is neutered. Is this some kind of purberty thing or something I should really watch?
He is peeing and pooing normal Drinks the same etc.