A 4 inch penis is on the small side with the average length being 5 inches but as for it being too small for an 18 year old, only she can know, because all women are different sizes down there and like different things. the point is if the said 18 year old is in fact not satisfied there are other option like oral sex or mutual masturbation to look into. Don't be discouraged!
This is below average, yes. But it is not the quantity, it is the way you use it.
No its actually big
A 5" penis is perfectly normal.
It's perfectly fine.
um im 14 and i have a 8.5 inch but everyone different and it small for a 27 year old
Yes. This is extremely small, the average size for a 17 year old is around 9 inches.
You are slightly on the small side considering the average is about 6 inches
About one inch a year.
Well... I am a 13 year old and i have a 3.4-3.5 inch penis so basically you as a 14 old should a penis size of about 3.0 inches to 4 inches so... Yeah your penis size is a normal average size for a 14 year old.
Well, medically, that is a little small, but, there really is no set size for a penis. You could just be behind a bit on puberty.
No its perfectly normal, When puberty starts it will grow also.
No, you will be alone forever.