What Are The Symptoms Of A Brain Tumor?

Hey, so there s this man, he s more than 60 years old, he was fine, and healthy. Till one day he started to make an extra interest in sexual activities. He always saw sexual movies and, what not. But, recently, it s getting out of hands. Although, the man is suffering from difficulties in having an erection, and performing sexual activities, this didn t stop him from watching these kind of stuff, and wanting to fix himself so he can perform. Also, it looks as if he has the I don t care pattern, now a days, he was not like this before. It seems as if this thing is turning to be his daily concern, it s weird, the man was very up tight, and religious. My question is, is this what is called as a middle age crisis, or, is it some case of a brain tumor, cause I ve read some stuff about a brain tumor casing such an interests?