Japanese Bridge

This is a sexual act necessitating five people. Two must be male and three female. It starts with one female servicing another female while being serviced by a different female, both of which are being penetrated by different males. The Japanese Bridge is similar to an expanded version of the Eiffel Tower

G.......................G
U->GIRL GIRL*<-U
Y......GIRL ^....... Y

Figure 1A.
*splash zone

Fig. 1A: Diagram of a classic Japanese Bridge