People will only know from the smile on your face!
Most spas do have showers, and provide some sort of soap. It's not uncommon for men to bring their own soap or body wash, and deodorant, I've done this a few times.
A good mpa will ask if you want oil, many now will offer coconut oil, others may use other fluids like "fuck water", which basically evaporates in a few minutes.
Either way speak up, tell her what you'd like.
This can be said for your session as well. Don't be shy. Talk to the mpa, tell her what you'd like. And just as importantly, listen to what she saying, and pay attention to what she's doing.
Have fun!
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