I don't believe it's creepy for two consenting adults with a large age gap to date. If a 25 year old woman dates a 50 year old man, I don't think it's creepy. It's none of my business. I don't judge them.
A man who dates younger women is called "creepy." A woman who dates younger men is called a cougar. Leonardo DiCaprio was judged harshly for dating a 19 year old woman. Most older women are not judged for dating younger men.
Sometimes it's hard to find a partner of the same age. For example, if a man divorces at 50, it would be hard to find a 50 year old woman. He would have to date someone younger.
The double standard is that men get judged harshly. Society has to change it's attitude.