Why do we genuflect in church?

We genuflect in church as a sign of worship of God who is present in the Blessed Sacrament in the tabernacle. We do not genuflect to the cross. We should genuflect with reverence and knowledge of what we are doing. It is understandable if old age or the frailty of the body prevent a person from genuflecting. Those who are able ought place their right knee on the floor before entering the pew. If your skirt or dress is too short or tight to genuflect properly then you should not wear it to Mass since it is immodest.