To worry about this conversation between 4 year olds

[greenapple123]

My 4 year old DS made a new friend at his nursery at the start of this term - another boy of a similar age. (Will refer to the friend as B for this thread) During bed time today we were talking about his day and he told me that B told him they can kiss tongues and they kissed each others tongues. And B kissed his face many times.
I am extremely worried after hearing this. The nursery he goes to has a good teacher to student ratio (around 1 teacher for 6 children or so) so I am wondering how the teachers could not have noticed this. Would I be right to assume that children are supervised at all times in a nursery?

AIBU to worry about this?
How would you handle this? Should I raise this with the nursery staff?

Eee yes that's concerning. I'd raise it. He's potentially just seen something he shouldn't have on tv but could be something more unsettling going on.

I would definitely report to nursery staff

You should raise this with the nursery staff. It may be nothing, but I would be concerned about B in this scenario it’s a bit odd.

I'd be worried about B talking about kissing tongues and would raise this

The nursery won't have noticed anything because young children are always hugging and kissing each other and it won't have been anything out of the ordinary.

I would mention it to nursery staff

Definitely raise with nursery staff.

I would be concerned about a safeguarding issue for B. Definitely raise it with the nursery staff - I would do this verbally and follow up.in writing. They can then follow correct procedures to investigate.

I'd write everything down just as your son said it. Tell him that he did the right thing by telling you. Tell your son that this is not appropriate behaviour for children if his age.

Report to school first thing, as the incident happened there. Also ask for a follow up confirmation that their safeguarding policy has been followed.

Thanks everyone for your replies. Very helpful

Nursery staff can't watch every child all the time. I'd definitely mention it.

Yes definitely report it to them, it's a safeguarding concern because what the 4yo is saying is not at all age appropriate and nursery should record it.