There are, imo, several types of

horny and horny! and HORNY!

One is the obvious, usually based on visual stimuli...photos, possibly following a genuine great tushy down the aisle at a grocery; sometimes aural stimuli, music, for example, or the swish swish of those moving thighs gently rubbing and swaying. Could be olfactory, a certain linger smell of perfume or sweat? "Pheromoans."

Second -- horny! -- usually subconscious, often associated with prolongued absence of intimacy, "asserbated" by all of the issues postited above ^^^ horny ^^^ and then there is ...

HORNY!!! a combination of all of the above usually buffeted by having BCD access to well written reviews, usually with "visuals" and quite often supplemented by companion albums, well-crafted ads, high level IOP, very prompt TCB and rates and service structures and strictures ideally suited for selective hobbyists.

Not saying that I know whereof I speak, but aside from intermittent dry spells over the years, I feel my hobbying career has been very well served and serviced.

But then again, I am a certified old fart planning to retire in 2041.

IJS