My penis size is 5 inches when it's erect, and my age is 17. is this size good or not, and can i satisfy my partner with this size? please help me, and how can i increase the size of my penis? please tell me what i should do to increase the size. and?

This is well within the normal range of adult size. If you desire a surgeon could make you bigger, but it is not worth the investment. You satisfy a partner by communicating with them and responding to their requests, not by shoving an oversized post inside them.

Your size is normal and big enough to satisfy a partner. Trying to make your penis bigger will cost money and is likely to make matters worse. There is no safe and effective way to make a penis bigger. Get HPV vaccine. Wish you good health! Safe sex: https://www.hopkinsmedicine.org/health/wellness-and-prevention/safer-sex-guidelines