I guess I’m trying to think in practical terms. Sexual arousal can happen between a man and a woman properly who are married, without lust being involved.
It seems to me that sexual arousal (which is what I’m thinking of since the OP had that in mind) has to happen in order for a person to lust, being lust is the overmastering desire for something. Although lust can manifest itself in other ways that are non-sexual.
In order to get to the lust level one needs to have an arousal first. If a person lusts then he/she has already passed the stage of arousal.
Perhaps I’m misreading the “Singer” model but it seems to be saying that the “genital response” which is the last response is a lust response, or is the lust response.
The Catholic Catechism says about lust:
2351 “
Lust is disordered desire for or inordinate enjoyment of sexual pleasure. Sexual pleasure is morally disordered when sought for itself, isolated from its procreative and unitive purposes.”
When the person reaches the “genital response” lust seems to happen, although within the context of a marriage if both parties are not seeking self pleasure for themselfs, nor apart from the procreative and unitive purposes of intimacy, lust doesn’t occur, although arousal has occured, hence my thought that lust can’t happen without arousal, yet arousal can happen without lust.
I agree that arousal can happen without lust. But, I believe that lust may happen without arousal.
IMO, and relying on the CCC definition of lust, lust is a desire, a mental act. IMO arousal is a physical act. So, each is independent of the other.
If lust can’t happen without arousal, someone who is impotent can not lust. I don’t think that is so. Although physically constrained, they can still have lustful desires.