my 8 month old had an erection

Imani

so earlier I was changing my 8.5 month old's diaper and his penis was erect. not COMPLETELY erect but it was MUCH bigger than normal and it was stiff. I was super freaked out so I googled it and apparently it's not abnormal... I've never heard of it happening so young though. anyone else ever experience this? my son is uncircumcised if that makes a difference