Daggering - en.wikipedia.org/wiki/Daggering .
It can get pretty rapey, but a lot of the girls seem to go along with it for some reason.
"Jamaican doctors have warned of the dangers of daggering, after having many cases of damaged penis tissue over the last year. The condition can result in permanent damage, and therefore must be taken seriously. Jamaican doctors assert that those trying to replicate the powerful moves of daggering in the bedroom can end up with dramatic injuries. They say the incidence of broken penises has increased in the past year, according to an article in the Jamaican Star"
