"I'm a love or hate thing for men. I alter the looks and feelings of the cultures. I will go up even higher if a person takes care of himself. I'm going to fool some people. I'm a mystery to others. Some people may want to try to hide me, but I'm going to show. I'm not going to go down, no matter how hard people try. What am I?"

Can't find the answer to this anywhere, and I only have 3 guesses. Any takers?

Based on the clues provided, it appears that the answer to the riddle could be "age." Let me explain why:

1. "I'm a love or hate thing for men": This implies that men have varying opinions about it, with some loving it and others hating it.
2. "I alter the looks and feelings of the cultures": As people age, their physical appearance changes, and their perspectives and attitudes may also be influenced by the passing of time.
3. "I will go up even higher if a person takes care of himself": By taking care of one's health and well-being, individuals can slow down the visible signs of aging and possibly look younger.
4. "I'm going to fool some people": Age can sometimes be deceiving; someone may look older or younger than their actual age, leading others to make incorrect assumptions.
5. "I'm a mystery to others": The aging process and its effects are often unclear and unpredictable, creating a sense of mystery.
6. "Some people may want to try to hide me, but I'm going to show": People may try to hide their true age or the effects of aging through various means, such as cosmetic procedures. However, ultimately, the truth of age will reveal itself.
7. "I'm not going to go down, no matter how hard people try": No matter what efforts are made to resist or slow down the aging process, it is inevitable and will continue to progress over time.

Please note that this is an interpretation based on the given clues, and there might be alternative answers as well.