Well personally I think you should tell him the truth. He might respect you for it or he might feel embarassed. He will be the one with shame, not you. Believe me, my 5 friends and I, when I wasn't dating my husband, were in this coffe house called 'Central Perk' form our old downstairs apartment looking at nude baby pictures of 2 of our friends that were there named Monica and Ross..Their grandma had just died and they were her photos that they got to keep. It was sweet and adorable.