Is it true women never notice at a crowded bar with a stranger touching their a*s when you walk past them?

Sometimes my friends and I will be at a crowded bar surrounded by gorgeous hot chicks in skirts who will be talking among their friends, partying, socializing, and having a good time drinking and they wouldn’t notice someone trying to get through even when that person says: “Excuse me, coming through.” I was buzzed and I still noticed a couple times, I would accidently grope some women’s a*s when I am trying to make my way through and they don’t notice. As much as I feel like I could take advantage of doing that purposely, I can’t take the risk and get caught but when its so crowded, sometimes accidents happen where I touch a women’s as I walk past to make my way through and she doesn’t even seem to notice. Is this true?