Gracie has been doing the same thing, she is now 5 months old and for the past month she she rings the bells to go out whenever she feels like playing, etc--not just to pee. While I don't want to discourage her from alerting me when she needs to go potty, I don't want her to think she can have me up & down at her beck and call for no reason! If she rings to go out and I know she recently went potty I will tell her "not now" and wait--if she really needs to go, she will continue to fuss by the door and I know she has to go. If I let her out, I tell her to "go potty" and if she starts to go off to play instead I call her back in so she realizes that ringing the bell to go out means potty or she stays inside. However, the weather has been great here, so I have been leaving the sliding door open during the day so she can go out and play whenever so it hasn't been an issue. Its tough because you want them to tell you when they want out to pee, so discouraging them from doing so can confuse them. I would say if you let him out and he doesn't need to go, immediately bring him in so he realizes that if he's not going to potty, he's not going outside. Hopefully he will catch on that ringing the bells only lets him out to do his business, not play...