I've always wanted to grope a woman sexy ass

Now It's just a fantasy of mine to do it, I use to do it to a girl in high school an she never once complained or got mad when I did it. Since I'm not in school anymore I would be more cautious of groping some random girl on the train, it's weird i have no problem filming a girls ass or legs. I'll get very nervous trying to fondle her ass or something like that I wanna try an put up some groping vids up but would hate to film one an the girl is all up in my face, cause she didn't like it. Now I have heard there are girls who like to be groped in public but I just wanna know how can you tell which ones would be cool with it ? any bit information would help. Such as would teens be more comfortable with it then a older woman or would white,black, asian type of women like it or not an which places are best to grope an not get caught doing it ?

Thanks.