Before being open to our kids re: the lifestyle, we should realize one thing...they are kids and their life is just begining...they need to first understand life...love...and safe sex first...
We didn't get into this lifestyle...without understanding love..friendships etc...we did all those and looked for more changes...so we are careful and wiser...
but...being open to the kids before..they could understand the life itself...probably too much for them....
My opinion is it's always safe to not to perform or precautions are taken before...