I guess some people could see it that way given the donglegate scandal, but it can't be harassment if it's not repeated. And if something is to be repeated, then lots of things can be used besides dick pics.
"sexual harassment" is a term with its own specific definition, which is not precisely a naïve combination of the simplest common definitions of "sexual" and "harassment".
> but it can't be harassment if it's not repeated.
Incorrect. Sexual harassment doesn't require repeated conduct, though repeated conduct is more likely to be harassment (both because it is more likely to create a hostile environment simply because of the pervasiveness, and because it is more likely that the actor will be in a position where they should reasonably have known that it was unwelcome.)
Pretty sure there are a LOT of women who would strongly disagree.