Tenga Deepthroat
It’s particularity is the “suction hole”: put your finger on it while inserted to create a nice vacuum. The internal structure consists of ripples, tightening-pass, nubs.. Western friends: pay extra attention to what version you’re buying ! Always look for the “U.S. Tenga”, because the “Japan-standard” edition is about 2/3 girth (which is too small…