Weird question

Hello!

I’m putting up this question on behalf of my husband.

We are on a road trip right now and my husband was changing our son in the bathroom. My son *hates* changing tables and was losing his shit as my husband changed him. This old man (grandfather type, not creepy) came out of his stall and cooed at my son as he was being changed and stroked his cheek to calm him down.

My husband was so shocked and busy trying to change him, that he didn’t do anything other than immediately wipe him down after the guy left.

As we left, we saw the man eating lunch with his family and we left. Now, a few minutes later my husband is very upset that he didn’t do anything to stop the guy and didn’t say anything. He’s afraid our son my have an std now because a stranger touched his cheek before washing his hands.

We’ve wiped my son down twice with wet wipes and antibacterial wipes and I confirmed with my husband that the stranger didn’t touch any mucus membranes (eyes, mouth, etc).

What should we do? What can we do?