Not very knowledgeable about s?

Everyone wouldnt feel it unless it was very big due where it would be touching on your body and that, so if ye're getting intimate and you want to be able to tell, why not stand/lie face to face and when you want to tell without being obvious, brush your hand over the area. If he is erect, it will be hard, almost like bone. And if he isnt erect, just act like you were re positioning your arm