Nothing is worse for a woman than having their sexual advances rejected by their man. "Men always want to have sex, there must be something wrong with me!"
Too. Much. Porn. It creates unrealistic sexual expectations. So when it comes down to it, yeah you're probably letting him down. He's def getting gratification from the computer instead of you...
Excessive masturbating. Because you don't just casually watch porn while you eat dinner... Which leaves you with nothing to work with because he already dismissed all his men.
You're stressing him TF out. Or it could be finances, work, or any other adult issue BUT it could also be you. So climb out of his asshole and give him some breathing room.
The low T. If his testosterone levels are low, he's not going to feel hot and heavy all the time like you thought he'd be. Seriously, if he has low sex drive, loss of hair, increased body fat, mood changes... call 911. Or his doctor.
He's cheating on you. If he's not getting it from you he's getting it somewhere else...
Guilt from cheating on you. He can hardly look you in the eye let alone put his dick in you, he feels so bad. But like would you even want his dick in you at this point?
Relationship probs. He can't get over that last fight that you won. It can be an ego thing.
He's getting sick. Being sick lowers your sex drive... and you wouldn't want to get sick anyways so win win.
Performance anxiety. Every guy has the occasional erection problems. Can't get it up, can't keep it up.....it happens to the best of them. Unfortunately, this can also cause anxiety for him the next go around.
You're boring. You can't just lay there, you know. You have to like ride it and wiggle and rub.
Orrrrr he could be depressed. Nothing to joke about here. If he's feeling down you need to be there for him, even if he won't go down on you.