Catcalling you can know through observations. It's hard to get data on rape. The studies in Morendil's conflict, though they seem to show that the effect depends on context. There's also the confounding factor that rapists select victims who will be blamed for their rape, and that clothing is related to that.

I don't think there's one identical motivation for all rapes, but I expect through enormous extrapolation and intuitive hand-waving that power is more often a motivation than sexual attraction.