If you've never seen Dead Ringers here's the plot summary from imdb:
The Mantle brothers are both doctors - both gynecologists - and identical twins.
Mentally however, one of them is more confident than the other, and always
manages to seduce the women he meets. When he's tired of his current partner,
she is passed on to the other brother - without her knowing. Everything runs
smoothly, until an actress visits their clinic, and the shy brother is the first
to fall in love. Will they be able to 'share' her ?
Okay. Hmmm. Yeah. Well maybe there won't be a grotesque birth/licking scene like in The Brood right? Yeah.
I don't know if I can really recommend Dead Ringers. To anyone. Ever. It's not bad, per se, it's just kind of aimless and less Cronenberg-y than his other movies. Stick with Videodrome, at least Debbie Harry gets naked in that.