what're some tiny details in lewd art or otherwise that makes you go hot ham and cheese over it? negative space under straps, adjusting clothing, etc.
Space under the strap is a good one. Just, a simple pleasure.
Id say, illustrations of breasts that really understand them for the weighty, flesh bags they are is a big one. Perfect orb tits dont do much for me, the HANG is important. Doubly so if the artist bothers to like, lean into the way really big tits kinda meld into the natural muscle/fat rolls of the ribcage/back. It creates this really interesting shape coming out of the underarm and going into the back that drives me wild.
Paizuri windows or paizuri-window-adjacent undone buttons in clothing are just immediate UOUGHHHHHHHHHH. Like, just the implication of free-use titfucking makes me go feral.
On that note, free-use in general or extremely casual vibes to public/group sex is a huge turn on. Its something i want to lean into more with my own art sometime cuz 🥵. It almost feels like the opposite of ahegao/fucked silly (which is hit or miss for me, usually miss!) in a way. Seeing characters enjoying sex but also still having casual conversations with someone is just really cute? They dont need to be IGNORING the sex either (tho that has its own appeal). Plus, then when the sex hits a point where one or more party involved can NO LONGER remain casual and do succumb to full cum brain, the contrast makes it hit so much harder imo.