It's sexist to treat one gender differently than another.
John and his friends Steve and Mary are hiking up a mountain and come to a large boulder they need to climb over.
John wants to get home in time for dinner.
After John and Steve get over the boulder, they leave Mary behind because she is having difficulties, and they continue on their hike without her.
After John and Steve get over the boulder, John and Steve assist Mary who is having difficulties, and they continue on their hike.
Mary misses out on a great hike and feels badly about herself.
Mary is able to continue the hike and have a great day on the mountain.