Trauma is defined as "a disordered psychic or behavioral state resulting from severe mental or emotional stress or physical injury." So, sexual trauma is a disordered psychic or behavioral state resulting from a serious negative sexual event.

Sexual trauma refers to any unwanted sexual experience that leaves a person feeling scared, overwhelmed, or unsafe. It can include sexual abuse, assault, harassment, or any form of unwanted sexual contact that causes psychological and emotional distress. Survivors of sexual trauma may experience a range of emotions and symptoms that can impact their mental and physical well-being.

Buy her a strap on

Yes, it is a proper noun.

No. This is a myth. Sexual orientation is fixed at an early age, possibly at birth.