Devices, lotions, and surgery do not make penises larger, except for one type of surgery that can make a flaccid (not erect) penis longer, but there are issues with surgery.
Penoplasty is surgery on a penis to make it longer. It doesn’t affect the length of an erect penis but makes a flaccid penis a little longer. With this surgery, a man's penis doesn't stand up as high as before surgery.
Typically, males think more about penis size than women. 85% of females, according to one study, are happy with the size of their man's penis.
Usually, penis length does not mean that the man can't have sex or that it will result in a poor sexual experience. If a boy has questions about his penis, he can ask his doctor.