My breasts are too big. My penis is too small.
First off: we are all allowed our taste. Just as a man might be attracted by large breasts a woman might be attracted to a large penis. If it’s a dealbreaker for some, live with it.
What matters about the penis, any penis, is the person that is attached to it. (I am using the word penis but people might be using toys like dildos and other safe tools of penetration.) What also matters is how that penis is used to give pleasure. A good lover gets to know the geography of the vulva, vagina and the butt. Good sex is predicated on good communication. The vagina has different tissues and a good lover can find the places that the engorged clitoris is cradling the vagina.
It’s easier for a smaller penis (dildo, clean cucumber…) to find those spots and move in the just that right, oooh, spot. The large penis will probably hit those spots too, but both need a thoughtful lover who is able to ask and listen.
So it’s/they’re smaller than the other peoples’ in the locker room. Get over it. If your lover likes a fill and loves you there are ways to provide that fill without a biological appendage.
