@m32s Bench press being a
whole body movement.
I would honestly say that the majority of the time I see people bench pressing they really aren't engaging their legs at all.
Loads of videos that I have seen on IG and, ahem, also on this forum, show me women who are benching with their upper body only, and often with a total lack of tension.
When you are benching your whole body should be tight, and curved at least a little bit, like a bow ready to shoot an arrow. Your arms, core, shoulders and glutes should be tight and engaged. Your hands should be gripping the bar as hard as they can, and using loads of pressure in your pinkies in order to engage the lats.
Benching isn't a movement where you just kinda let the bar complete a controlled fall onto your chest and then you push it back up, anymore than a squat is a movement where you fall into the hole and then hope you have the strength to stand back up again.