Went to Walmart today to buy shampoo for our mutt and got a real friendly checkout clerk who looked at my purchase and said, "Ooh! Baby's getting a bath! Just be careful--my chihuahua was itching so I took him to the vet and the vet said I was just washing him too much! Well I wanted him not to smell like a dog. Ooh be careful when you use this (pointing to Sulfodene) --it hurts if it gets into eyes," etc. etc.
I usually take care not to buy anything too embarrassing or exciting at Walmart, still it would be nice if clerks wouldn't give me advice and opinions about my stuff.