Should you smell nail polish instead, hurry to the bathroom to clean up the black nail polish he helped himself to in his quest to imitate his sisters' painted nails. And be grateful he was in his pajamas so the spots don't matter so much.
Should both of these happen within a month, know that it is time to stop ignoring your son at bedtime. Your hope that he will not disturb others will crash with the reality that he will disturb you. It is time to change what you are doing. It is not working.