Sexual arousal primarily comes through the five senses. Below is a detailed description of the different mediums:

1) Arousal through vision (eyes):
Seeing something that triggers desire or lust in the mind and body; however, this varies from person to person. For some, even a slight erotic stimulus can lead to an erection, while for others, neither watching porn, having intercourse with a woman, nor using medication can cause an erection.

2) Arousal through touch (skin):
For many, just seeing or thinking about something doesn’t remove the coolness of the penis; however, physical touch or contact works wonders. In this case, stimulation spreads to the brain and body through the nervous system.

3) Arousal through hearing (ears):
Some people get highly aroused by hearing erotic conversations or stories. Hearing descriptions of a woman’s various body parts or listening to a woman’s voice can also arouse some individuals.

4) Arousal through smell (nose):
Certain fragrances can evoke sexual desire in some people. Additionally, the natural scent of a woman’s body can also arouse many.

5) Arousal through the brain (thoughts):
Sexual arousal can occur through sexual thoughts or fantasies. Imagining various body parts can also lead to arousal.
All of this is normal; however, for some, exceptions can be observed. In some cases, it’s normal, while in others, it may be abnormal or perverted. Those with significant physical issues may not experience arousal through any of these methods.