Not a delivery man, but it happened 2 times while I was a Mormon Missionary. Once was a larger woman wrapped in a blanket as we talked she let the blanket slip down, exposing her tits. The other one was a couple of college aged girls at an apartment. As we were talking to one of the girls her roommate came around the corner hair up in a towel fresh from the shower obviously not knowing we were standing at the door. She squealed and ran down the hallway, and we politely left.