My thoughts are condensed down to two words:
Fuck that.
The idea of another blokes cold muck, used as a lube for your old chap is bad enough, but to want to bury you head in a muff filled with someone else bollock yogurt /mine mayo just makes me want to vom.
Granted, we all have our own quirks and preferences, so if that's you bag, more power to you, but Jesus wept that doesn't do owt for me.