For me, thongs are just normal underwear and swimwear. I wear them every day, but I don't want to hide the fact that they are also an erotic component for me.
I also go to the tanning salon. I have a special thong for the tan line. I cut off the pouch so that the penis is also tanned and only a narrow light stripe is visible from the front. From the back, however, you can clearly see the tan lines.
I like running tights too. I wear them in Gym or for running with a thong as underwear. My favorite tights are from twioo-sports - they are shiny and they accentuate the bottom very well.