The majority of people aren't perfectly symmetrical. We don't tend to notice how one foot is slightly bigger than another, or how one arm is slightly longer than another, but we surely tend to notice if one of our breasts is bigger than the other or if our testicles don't seem to hang evenly...

Since you are concerned about it it probably is worth mentioning (I have no idea just how much of an asymmetry you are talking about). But... The majority of people in this world aren't perfectly symmetrical.

One of my breasts is bigger than the other. I've had... Guys not notice... Or one who did and found it cute (and rather fascinating). Like they had different personalities or something lol...