I just saw a commercial for Cialus, a new erectile dysfunction drug.
The drug works for 36 hours and allows men to have spontaneous sex (I guess).
After the usual list of side effects the announcer warned that erections lasting four hours or more, although rare, require hospitalization.
Would that warning scare you away or make you think, WOW!! I COULD HAVE AN ERECTION THAT LASTS FOUR HOURS!!!!?
I would say that it is a very effective commercial.