When toddler is potty training is it normal for Grand parents ...?

So, here's what I see and it's just an opinion from what I've read and nothing else that I know or don't know about you and your family history. Kids don't know "sexual". To them, their butts are the yuckiest, funniest things ever (My 3 year old runs around screaming "PooButt" and laughing hysterically!) Kids laugh. Kids love it when grown folks can let go and laugh about things that they find funny too. It's not a question of your son turning gay, or your father getting his rocks off while spanking your son. There doesn't seem to be any ill intent. Personally, I wouldn't worry about it, EXCEPT that it does worry you. For 1 reason or another, you don't like it. You're his mom and you have a right to rear your child as you see fit, so long as it's healthy. But here's one of those universal truths that you're coming into seeing right now: Grandparents ALWAYS THINK THEY KNOW BEST. Wither it's the truth or not doesn't matter. As they see it, they have more experience than you and they've done it all before so that entitles them to be the know-all go-to guide concerning all things parental. I promise this won't be the last thing that they do that really gets under your skin. But, you CAN let them know that it offends you and that you don't think it's healthy and that if they can't abide by the way you want your child raised, they don't have to participate quite as much with their new and ONLY grandchild. I mean, not that I think you should deprive your son, but it will let your parents know that the offense is serious and that you wish to be taken seriously. See if that helps, but don't just let it go if it gets to you that strongly. I DO think that you should take a step back and ask if it's ACTUALLY hurting anything before you go to war, though. Cause it may not be worth the pain that the outcome would cost everyone involved.