When I was in my 20s my gf at the time got a dog. When she was over and we were naked. She tried to convince me to let her dog lick my cock. I said no way. I was afraid he would bite it thinking we were playing. She kept saying common let’s see what he does. I was not willing to try.

Later on I realized she must let him lick her pussy. But she wasn’t comfortable bringing it up without me trying it too.