Pegging, defined by Dan Savage as the sexual practice in which a woman penetrates a man's anus with a strap-on dildo, is taboo. It's an eventuality surrounded by incredulity. Many gay men look suspiciously -or with hope- at straight men who like to be penetrated.
What two characteristics make mammals unique from other vertebrates? Mammals are unlike other vertebrates in two distinct ways. First,  all mammals have hair, unlike other vertebrates. Also, female  mammals carry their offspring to full term â¦in the uterus, whereas  most other vertebrates lay eggs.
Students will understand thatâ¦. Many likenesses between offspring and parents are inherited or learned. Mammals have a combination of inherited traits and learned behavior. A mammalâs behaviors are influenced by environmental factors. Animals vary in their genetic predispositions and capacity to learn behaviors.