Bike seats must be comfortable and suit your body because you are going to be sitting on it and riding, and it all depends on the kind of rider you are while riding a bicycle. There are many kinds of bike suits which are made to suit the needs of different riders and their riding preferences. For example, for a fast rider the bike seat has to be narrow because you will barely sit on it while riding fast and because you are likely to prefer thinner seats. Also while you are pedaling very fast a regular seat may be more interfering than a thinner seat.
Manufacturers offer different seat modes for both men and women and the differences between both the categories are quite significant. Men and women definitely have different riding preferences and different styles. The rear of the bike seat supports the bones and muscles when you sit and the nose is designed in such a way that it will help you gain control of the bike with thighs and body weight support. At the same time, the nose of the bike seat also causes problems for the riders whether it is a woman or a man. In the modern biking world there are plenty of bike seats that help you ride comfortably which are designed for individual riding preferences.
There are some models of bike seats that keep a centered channel along the length of the seat and some others have a hole towards the front of the seat. The bike seats that have centered channels and holes are called cutaway seats. Other kinds of seats are gel seats, foam seats, leather seats and so on.