Guilty over little things?

OK im a teenage boy that is just going into puberty which i think is the cause of this. For example i feel guilty over seeing roger from american dad in a bra. ( i know stupid ) then looking at Tanya from Everybody hates chris's chest ( Nothing there but still ) Then i am on Ecchi and see an add with a big erected penis that reads monster cock >.> i have no desire to discuss this with my parents so i want to know if there is something wrong with me or an individual explanation for all 3. Thanks people its just stressing the hell outta me. :)