Hello Sir, Myself Name Is Rajesh My Age Is 38yrs

Hello sir, myself name is rajesh my age is 38yrs sir my marriage in April but when i do sex with my Girl friend my penis bends down through right side after few seconds i cant insert my penis into my wife vegina so pls suggest me some medicine to keep my penis straight for more time and i want to enjoy more time sex with my wife so pls suggest me sum medicine.

Sir plz give take medicine one mnth course.