OMG, this is the weirdest thing - I'm super freaked out. I did a total double take because I have an almost identical photo to this of me and my dad - his shirt is off, I'm wearing a yellow onesie. And I swear, your dad is like his doppelganger. I will post a picture when I get a copy from my parents. For now - a different photo - maybe it was just the angle, but in the photo you posted, it REALLY looks like him!!
(OMG. Please let this not be the time I discover my dad had a second family on the internet. Haha. I think.)