DP GB with my teenage girl

Hi guys, we (she 19, 173, 50, he 40+, 185, 80) are looking for a few guys with a lot of stamina for an evening where she wants to try DP/GB - sandwich sex for the first time (we DONT want money, just drinks on you for a nice evening at my place very near to the center). The ideal candidates have a smaller to medium dick (14-20 cm) because of the anal part. Let me know if you are interested. Thanks