I'm looking for more videos of girls humping guys like they're penetrating them, but without a strapon.
http://www.tube8.com/fetish/cfnm-girls-dry-hump-guys-in-front-of-friends/2563061/
This is a good example
https://xhamster.com/movies/926104/black_girl_humping_a_guy.html
Another example
It also looks hot if the guy has a buttplug in his ass and the girl is humping against it.