My dad is 45 and he smokes weed. With my classmates. I was ready to fall through the ground, when I saw it (about 8 years ago).

Of course, we had a serious conversation after that, but his only response was like “don’t tell your mum”.

And his humor is just terrible: the day when I graduated from school (private one, only for males) he brought a young girl (neighbor’s daughter) to the morning ceremony and asked her to stay close to me in a group photo for the school album. Yeah, that was funny, but when my principal gently asked us to stop it, my dad answered “hey, we paid a lot of money to you and, moreover, I did never teach you how to do your job, right? So please don’t teach me how to be a good dad”.