These emotions activate the sympathetic nervous system, which in turn blocks the arousal needed to reach orgasm. Sex with a partner might evoke fear of intimacy. Or, it could cause anxiety over the loss of control and the surrender to bodily sensations necessary for orgasm. Some men are so anxious during the closeness of sex that they protect themselves from the overwhelming feelings by not permitting orgasm. This minimizes their vulnerability, but detracts from the couple's shared pleasure.
Depression also can suppress the ability to easily have orgasm.
These issues are often best dealt with in therapy. All rights reserved.