Yes very normal

3

if you look up what the entire anatomy of it looks like under the surface, this will make a lot more sense to you! its honestly a lot more analogous to a p*nis than most people realize as far as physiology, so yes it absolutely can get “erect” or engorged. and since a lot of the surface area under the skin can receive pressure or indirect contact when you’re walking or sitting, it makes sense if you’re getting that way randomly. you’re not weird and you don’t need to be ashamed of your body dw!

3