So thier is my picture of my little brother on my wall naked in a bathtub when he was 2 years old, i looked at it for 10 seconds and felt some guilt after, im not trolling 100% im just curious to know.
No. You don't need to be afraid of such things if you don't do it intentionally and you don't feel attracted and you stop it after a short moment. Thorough the life you will see a lot of such things - for instance in movies, social media or advertisements. It is better to avoid that stuff, but you don't need to blame yourself for the situations you cannot avoid.
This over reaction mentality that people have is fucking ridiculous https://www.nofap.com/forum/index.php?threads/seven-days-now-what.183685/#post-1566190