Touch and scent. Occasionally, hearing other people do it (in hotels) has flicked the switch for me, but not often.

Musk has an impressive mind, in some ways. But what possessed him to spend 40 billion dollars on a glorified chat forum? He could have transformed millions of lives by distributing medicine or building infrastructure or funding scientific research with 44 billion dollars. Instead, he blew it on twitter.
Yesterday, I published my first trans story (and second RR) and my husband mentioned "You must have done most of the categories now?"
This prompted me to work out how many I haven't done (15) so I'm sketching out ideas for the remaining genres. I've got my ideas for fetish, femdom and money and will start on them after work!
This one: The Curious Case Of The Clickbaiting School Clerk | Lush Stories
And I also like,
I kiss her breast, quenching my thirst with the water cascading over it. She runs her fingers through my sopping hair. My fingers slip into her pussy, and I feel the ridges and flesh.
Soon, I need to decide if I’m willing to go all the way and lick her genitals. My first all-girl shower will definitely be in my head the next time I masturbate.
Never used anything except fingers or a dildo, but your post reminded me of the outrageous dildos I saw in the Sex Machines museum in Prague and made me giggle. I wrote a story about them: The Horny Housewives of Prague | Lush Stories
Good:
The vast majority of comments on stories are positive and supportive.
There are some excellent writers producing high quality stories that you can read for free
The forums hold many interesting, thought provoking questions to answer
Bad:
Occasionally, and to be fair it doesn't happen often, I get sent unsolicited dick pics.
Some excellent writing gets buried in terms of engagement by stories about fathers screwing their daughters.
I find stories that reduce Black men to sex objects serving white women distasteful, borderline racist.
(I recently did a story with both the above scenarios, but the story was a satire on story popularity on lush)
For me, the best thing is that everyone is so supportive of each other. I hardly ever see any snark or negativity in comments on anybody's stories. Other writers overwhelmingly offer each other encouraging praise.
In terms of my writing, the positive feedback on my first story was a real relief. If it had been lukewarmly or negatively received, I might have said, "Oh well, erotica isn't for me" and quit. But people were so encouraging I tried again, and now I've written more than 100 stories!
Also, my first recommended read, which is hidden because its an entry for the current competition. It had started to bug me that I didn't have one after a year. It was kind of a relief, like finally losing my virginity when I knew all my friends had done it already ;)
I recently wrote a satirical story about what attracts likes and views on Lush, loaded with all the popular tags: The Curious Case Of The Clickbaiting School Clerk | Lush Stories
I'm interested to see how it does long term, its too recent to know.
My most popular story factoring in likes/views/favourites is The Sluttiest Thing I've Done | Lush Stories