My question is... Size may not matter if you are talking about a 5" and a 7" or something along those lines. But is there a size that is just like saying um no, thats too small. Basically size doesnt matter unless you are under ___ size.
example does size matter when you have a 2"x1" penis and a 10"x4" penis.

Asking because i am 18 with a 2"x1" erect penis

This is completely serious question
Thanks