Take 100 women of fertile age from the street and put them in a room to ask a guy how many he'd screw. The average guy would automatically fuck 80 of them just for fun/sport. The other 20 depends on how picky he is. The most desperate and thirsty will fuck any of the 100. The more picky average guy will only fuck 80 of them, although that number rises fast when he's drunk at a bar. A lot will fuck all but the most fat and hideous.

Take 100 men from the street and put them in a room to ask a woman privately how many she'd go with. The average woman would automatically reject half of them at a glance. She'd then reject the thought of being with another 30 from quick observation.

Out of the other 20 it just depends how picky she is, the same way it depends how picky the average guy is to how many of the bottom 20% of women he won't fuck.

TLDR - as a guy you have to stand out from the crowd. You've always got to be one of the top 10 or 20 percent of guys in the room to have a chance. The majority of men want to fuck the majority of fertile age women. The majority of women want to fuck a small minority of men.