Nothing to worry about,
I was the same when in my teens,
satisfied many without cumming myself,
you will find one day everthing just feels so different,
Your partner maybe in just the right position , wet enough so the walls allow a marvelous sensation along your shaft and deep inside of you.
with this sensation you look down admiring the female beauty that is sharing this moment with you,
Breasts in magical motion , panting in anticpation of each thrust, which causes you to get ino a position of trying to see your penertration.
all of a sudden it all comes together.
a sensation to behold
a moment to love.
make the most of it!
as you get older there will be times you wish you could relive the days of endless sex without cumming