They did an interesting experiment with mice that I watched. In the experiement they took a male mouse and put a little vest on it and then put it in with a female mouse. The male mouse mated with this female several times over the course of a couple of days. Then they took the vest off and put the male mouse in with the female again and to their surprise the male could not mate even when the female was teasing.

The whole purpose of the experiment is to see how "if" introduced to something a certain way can change "if" something is taken away. When they put the vest back on, sure enough that male mouse mated again.

It very well could be that because you "changed" yourself by being circumcized without your realizing it, it affected your ability to have sex. You did change something and made it different and that part that you took away does have sensors in it. You "can" still adjust to that change gradually, you just have to "practice" and learn, and you may want to do some "self practice" for a time so you can get used to this change.

Also, it is not unusual for a male to not perform just right when being intimate with a female for the first time either. And not getting an erection is normal as well as premature ejaculation with a lot of males too. When it comes to being "intimate", it really does take time for two people to get comfortable and learn about each other.

Also, it would serve you well to spend some time reading about women and how to understand them "sexually" because not all women can actually orgazm just through penetration. It takes "time" to develop a relationship, it is not being fair to yourself to assume how well it goes is all "your" responsiblity.

There is nothing wrong with becoming a student and going to a library and taking out books where you can learn so many things about women's sexuality, developing good relationship skills that you just don't happen to "know" how to do right now. Relationships don't "just" happen like you see in the movies, in fact in case you have not noticed the actors and actresses themselves fail at relationships all the time. There is a lot you can learn on your own without sitting with a therapist too. Also, everyone learns by "doing" so "learning" about how to have a relationship is something everyone learns "how" to do.