Is it normal for a 10 year old boy to let a 4 year old touch him?
So yeah, the title really says it all. There was no force or anything involved, and the 10 year old didn't ask the 4 year old if he wanted to. The 10 year old was just playing with his penis and the 4 year old asked if he could see it and play with it, and so they 10 year old let him.