[Probably NSFW] Ancient Greek and Roman statuary, depictions of men?

Most Roman statues of men tended to have the men wearing togas or capes or armor. There are some Roman male nude statues, of course.

Greek statuary generally depicted more nude (i.e. unrobed) males as a percentage, although of course there are quite a number of statues showing robed men as well.

As far as I can find, both Roman and Greek statues of men showed flaccidity, not tumescence.

Art history majors: is there any evidence of statues showing erections, or was that simply “not done” by ancient sculptors? Or were such statues made, but then destroyed by various censorious religions groups over the millenia?