thrusting something back and forth into some sort of receptacle
 receptacle?  So you can f**k a glass or a cup?  I think it needs to be an orifice and preferably living.  Ahhh, but then what about 'inflatables'?  Never used one myself, but would it qualify as a f**k??
 receptacle?  So you can f**k a glass or a cup?  I think it needs to be an orifice and preferably living.  Ahhh, but then what about 'inflatables'?  Never used one myself, but would it qualify as a f**k??