There is no risk from him kissing your penis, assuming he didn't suck or kissing it for any amount of time. A quick kiss or lick isn't going to transmit anything.
His penis touching your bottom as you cuddled is fine, too. The skin to skin contact STDs - herpes, syphilis and HPV - require some friction to transmit, and the skin on your butt is too thick for them to penetrate.
There is no risk from hands touching your penis, either, or your hands touching his.
I see no reason to test, or to avoid any contact with your wife.
Thanks for your response. He kissed it about twice or three times for no more than 30 seconds and it was my shaft an: balls. Pretty sure he didn’t reach my bell end.
Based on this you believe this total experience is zero risk?
When I asked him about std he laughed and said our encounter wouldn’t be a risk and also he states he is clean.
I’m just worried!