If you don't get much luck on here then you could check out websites like purpleport and/or adultfolio (although for the styles you mention then
adultfolio would be the better fit as they allow fully adult levels, other sites will ban) ...... they're websites where models, photographers, videographers, artists, designers etc can set up profiles and then connect and arrange shoots.
They're both UK based sites with a good number of UK members.
Basic/limited profiles are free to set up and you can search for local photographers or set up a casting etc .... for shoots where no money is involved then you'd need to look for the terms 'TFP' (Trade For Pictures) - 'collaborations' and maybe 'content share'.
The benefits of those sites is that there's an admin team and reference system that makes it a little easier to judge who you're arranging a shoot with.
Bear in mind that male models usually find it more difficult to find work in general (which can be disheartening) .... but if you're doing this more for fun and TFP then you should be able to find someone to shoot with.
Also be aware that any photographer would want to use images from the shoot in any (or all) their profiles. If you want images to remain private then you'd probably have to pay for a photo shoot.
If you'd need to be an anonymous model and keep your face hidden then that might limit the photographers who'd want to shoot you ... although, there are a few anonymous models who seem to do great shoots so it's certainly not impossible.