Never been seriously assaulted, but as a teenager was subjected to a fair bit of sexual harassment at work, nearly always from drunk female customers. (Was working as a waiter.) One particular incident involved a table full of women groping me every time I went near them and laughing uproariously when I told them to stop. I complained to my boss, who thought it was funny, and told myself it was nothing serious and I should just laugh it off.
Even now I feel embarrassed at my reaction, as if I shouldnt have been upset, but I really was. One woman at the table put her hand down my pants and grabbed my genitals as I was pouring wine. I was a polite and shy young fellow, and probably hadnt been forceful enough in my previous demands that they stop, and I probably shouldnt have gone back to the table. Anyway, I YELLED at her to take her hand off me and tried to break free, which tore my pants. The rest of the table thought this was the most hilarious thing they had ever seen. The woman would not let go and I had to grab her hand and prise her fingers off me, at which point she got quite angry at me, as if I was doing something wrong.
I was more angry than I ever remember being, and just called the police. At the time I thought I was probably overreacting, now I think it was the right thing to do. Two cops arrived, took statements from all concerned, and the woman readily admitted what had happened. She was absolutely dumbfounded when she was arrested and her friends were
outraged. They could not see that they had done anything wrong. One of the cops asked if it would be OK if a male diner stuck his hand down a waitress' pants, groped her and refused to remove it. The woman said no but that was totally different. They said things like: "We were just having a laugh" and "get over yourself". which really made me feel better

. Anyway, the woman was later let off with a caution but she did have to spend Saturday night and all day Sunday in a cell. I got a letter of apology from her too.
The main thing this incident did for me was raise my conciousness to milder verbal forms of sexual harrassment which I had been guilty of myself and had accepted as part of the work culture. Fortunately this incident made me adopt a zero tolerence policy towards inappropriate behaviour in work, which has stopped some bad situations for other people before they got serious.