[ENFJ]

I have been following the "newbie" routine for 3 weeks after having a poignant talk with my wife of 18 years.
It seems that she had a former boyfriend that was as she put it "hung like a horse".
She said that our sex like is good, but she does not have the same type of explosive orgasms (with thrusting only) as she did with him.
I asked if she would show me how big he was and 8.5" x 6.5" would fit the bill it would seem.
She said she wished she had never told me,and that our sex life is just fine but her interest in this PE stuff is aroused (pun intended) and just said, "Surprise me."

My starting measurements: BPEL 5" and 5.75" erect girth.
After the three weeks, my erections are harder and my erect girth is just under 6". Length is the same.
Are there excercises that work better for length than girth?
I guess it is possible to get bigger, but growing 3"- 4" in length and another .5" in girth?

I guess I need a little pep talk.

thanks