open-faced sandwhich
joe and jane asked me to do a threesome with them, but fuckit, they wanted to do an open-faced sandwhich
a male-male-female threesome, in which the all three participants lie on top of each other appropriately connected
"joe and jane asked me to do a threesome with them, but fuckit, they wanted to do an open-faced sandwhich" What is the definition of "open-faced sandwhich"?