Seriously?? Im trying to imagine how you have sex without seeing each others genitals.. I can well imagine how it is possible to get away with never seeing a woman's genitals. She may have a lot of hair surrounding her vulva, or else she may leave clothing on and give you just enough space to insert, touch, play.Or she may keep the lights off, and tell you just to dive in and out. Remember many women never choose to really see/examine their own genitals. And many men would not know a clitoral glans from a bee sting. But a man's penis.. hmm.. once erect its quite unmissable actually. I wonder why he hides it from you. Or Im guessing the two of you have created a kind of sexuality that allows a penis to be unseen. Maybe you are doing oral sex under covers ... or perhaps oral sex is not on the radar for you two. Which is perfectly fine. What about condoms? How does this work? In all this conjecture Im not answering your question:) Indeed you may ask him if you can see his penis. He may be flattered or think you are being too forward. So beware that you do not risk being insulted for asking or rejected. Oh, do let me know what happened.