No window shopping
There are no gay male window shopping in the red light district.
It did exist many decades ago but many windows were broken.
The legal prostitution now goes on inside several houses. There are four that I know of. Each place has a bar that you can sit at and review the price list. The list will consist of the services provided. The service includeds a private room with toilet, shower, bed, sheets, towels and time frame.
The houses have several rooms on the premise. Some of the houses are private and some of them are public. The boys/men are in the area for social intercourse as well.
May first time in Amsterdam in 1989, I made a point of visiting each one to see what is going on. Most of the men are in the night clubs after their long work day.
What a great country. By the way, other cities in The Nederlands have the same options as Amsterdam.