So? I'm married for 30 years, and I'm still attracted to cute young women. I just don't ACT UPON my temptations. Is it so hard to understand?
And a good looking young guy turns my head. And any other normal female as well regardless of age.
But temptation is not sin.
Entertaining it. Engaging it. Acting on it. That's sin.
Nobody can help the thoughts that pop into their heads when they're not expecting it, but they don't have to keep them there.