Is it normal ??????????????????

i have a friend who likes to see old ladies (like in 50 ) in ual ..they arouse him more than normal girls...he is v. horney n lately he said that when he thinks abour the male organs he feel strange..he like nothing about guys but when he think about the sensitive areas he feels strange..he saw nude men on the net n feel nothing..but he said that he got that tingle in his organ when he tink about male organs wizout gettin harder..but the tingle bother him..he got me freaked out but iam sure he is straight..what should i do ?