I've only had the experience once and it was wierd at first but ended up being cool. It was during college and my roommates mother came to visit for the day. He told me ahead of time that she smoked and might ask to smoke with me but I didn't believe him. So she comes and we're all chillin or whatever and she starts whispering to my roommate if it was OK to smoke and he's like, "Yeah!". So she whips out this dime bag and starts twisting up a joint and I'm thinking, "Oh shit, I'm going to smoke with someones mom". Sure enough, we were puffing away. Later in the day, we smoked from my bong and it was her first time using one. She was so goooonnnneeeeeee.

But yeah, it was a little weird at first.