"Michael anthony MA"
You said that your mom is still going with you and staying in the exam room when the doctor, your usual pediatrician is performing your examination, even at the end when you are stark naked without socks or briefs.
Why not if you are not embarrassed and if the doctor who might be used to that situation since all the years that you were going to see him with her, so he agreed certainly with that uncommon situation.
It is uncommon because you said that you are now a sophomore student in a college aged of more than 18, you are no more in high school where it was more understandable even after 14 age.
As long as you were in high school , I presume that he found it rather casual , more over since all the years he had seen you , he was used to that situation and it was your choice to continue to go to see him instead of going to see an other doctor for adults.
And since you have played to a lot of sports and be members of many teams at high school, you might be used to change until nudity with others in a locker room and to take a shower in group, may be also to have sport physicals in group ? or to be naked at his office if you had not group exams at school like in the past but were freee to choose your doctor and you had a routine check up mandatory to fill a medical form for fitness at sport practice and competition.
But it is strange to have his mother present when you are a college student ? and even if it does not bother you, it is strange that she wants to come with you ?
I notice that you like to wear tighty whities for underwears like in the past and are pleased because you noticed that more and more boys are doing the same and you enjoy the view in the locker room...
May be you like to be exposed in an underwear which was the kind of underwears of boys during a lot of years in the past or to be exposed naked to other persons.