This is the only acceptable form of discrimination in my book since Cleanliness is next to Godliness!!!! Show them no mercy and send they stanky ass back to the shower for round 2. Some people just been stanky so long till they don't even know they're in a perpetual state of stankiness.
This cuts both ways. I would always request ladies to shower with me before hand even if they don't stank because showering should by default always be part of any healthy session.
Just a PSA