I think he may have ejaculated inside of you like you think. It would have came out if he did afterwards like he said he had. He can stop from ejaculating, but if he does ejaculate, it would come out. You are going to get pregnant if you keep having unprotected sex. I believe you are young and don't want to be pregnant, so use condoms every time. No exceptions. Talk to the pharmacist at the drug store about using condoms or other protection you can use with condoms. Ask him also the protection rate, he will tell you. They won't want you to get pregnant either. Please be careful and don't get pregnant.
Hi Princess, I take it you mean nutting, the aty of being able to hold his semen back by using his PC muscle, takes a lot of skill from what I can read about it, and was hard to find info on.
Intresting way of controling himself.
Is that what your looking for, but needs a very strong PC muscle.
I found it by googling the sexual act of nutting, its the first answer.
Good Luck
It is not possible for a man to ejaculate and by force of will, to somehow cause the semen not to come out. Either he is ejaculating inside you and not saying so, or he is not ejaculating and doesn't want to admit it. The only time a guy would ejaculate and nothing come out of his penis is if he had some kind of internal mix-up in his urethra that caused the sperm to go somewhere else. But one would think that would be painful, and certainly a guy wouldn't try to disguise that condition as holding back the semen by sheer force of will.