I have jacked off with my dad and I'm his only son to. My dad was single and I lived with him from 13-18 years old. My dad had a one room place so it was just easier for us to do it together. We would jack off together at least once a day. A great father and son bonding experience! We would only jack off together, anything else would be too weird. My dad is my best friend and I'm sure this has made us even closer. A special bond between a father and his son.