Don't touch the bar to your chest. If you have long levers and are an ectomorh, the mechanics of the traditional bench press that you see dudes swearing by in YT videos needs to be altered.
If you have long arms, by the time the barbell touches the chest during the eccentric (lowering) phase, your upper arm is well past parallel with the floor. When your upper arm passes parallel, the resistance transfers from the pecs to the shoulder and the chances of your shoulder rotating anteriorly are increased significantly. It puts a ton of stress on the structures of your anterior shoulder capsule and can easily lead to tears and other injuries. Basically as the elbow travels behind you, the humeral heads jumps forward in the shoulder socket. Bad. Not worth it unless you are in competition and HAVE to touch your chest. Especially if you've already experienced pain.There's nothing to gain by touching your chest if you have long arms.
It's easier for shorter dudes with shorter arms and barrel chests to touch the bar to their chest because by the time they touch, their upper arm hasn't traveled as far and load remains on their pecs.