If a man chooses to go down on his lady, and says he likes the scent, I think you can safely believe he means it. Certainly in my case, I adore a woman's scent so much that I enjoy going down on her more than any other form of sex. If her scent is intensified by the passing of a few hours since her last wash, this feeling is even stronger.

As to what is normal, I think that there is no such thing. Each girl's scent is as different as her personal signature, and I never encountered one that I did not find delightful.

I would encourage women to be natural in this regard. Certainly wash it in the shower each day, but never cover up with perfumes and deodorants. The natural "fragrans feminae" is the best perfume there is.