Coworker keeps touching my breasts & butt?

I started a new job almost a month ago and it requires a lot of training. I work for a cellular service. Anyway, I shadow my other coworkers and I've shadowed one in particular a few times, he's not much taller than I am & he gets extremely close to me when I'm shadowing him. He has brushed & touched my breasts & butt I'm not sure if it's an accident bc he never acknowledges it. He doesn't apologize or anything. He will get too close and his arm rests against them for a second too or he has flung his arms & touched my breasts & butt that way. He's touched my butt probably 2-3 times and touched my breasts multiple times. Why does this keep happening & why doesn't he ever acknowledge it or at least apologize? I've never said anything bc I always thought it was just some sort of accident, but it keeps happening...
Coworker keeps touching my breasts & butt?
Post Opinion