I am male with 33 years and suggestion from my friend that to involve in sex,the penis shape has to be considered.is it compulsory that shape plays role while to have sex.But my penis shape is conchy.The middle portion of my penis is circular and if inserted into my parttner, can it be inserted without pain for her as the width of vagina is not wide.by the way my penis size is 4.40 inch when ejaculated.please give necessary suggestions for safe sex.