Perfume on the clothes instead of my body. Prevents the scent from getting on the gentleman.
Lip stain instead of lip gloss or lip stick. Also prevent it from getting on the gentleman.
Purchasing client specific toys and keeping them in baggies with pseudonyms to name them. It is a personal thought for a specific person and removes the awkward idea that the toy might have been used with another.
Bring masculine shower products if a shower or bath is intended. That way they don't smell like hotel soap or me when they leave.