Of course they can...it just isn't demonized as much because of the biology of sex between men and women. In normal situations, the male is entering the female. There's a level of submissiveness that must be reached on the part of the woman for this to happen, or it becomes violent. So in the case of an older woman coercing a younger male into sex, she still had to submit and the male has to be somewhat willing for it to work.
This normally isn't the case when a woman is raped. But it doesn't make it any better.