Most women I know want sex to hurt. I know lots of girls that want to bleed.
Con: You sometimes end up being the victim of large penis humiliation.
From a straight man's perspective:
larger size pros: 1. May provide more stimulation to vaginal deep spots through length and possibly clitoral stimulation through girth during vaginal intercourse. 2. May allow some positions not possible with shorter lengths. 3. Reduces the likelihood and frequency of popping out in a number of positions. 4. May be more psychologically stimulating to some women. 5. May provide more stimulation to the man, depending on vaginal size. 6. Allows for longer strokes due to length.
cons: 1. May prevent complete insertion in some positions due to length. 2. May result in painful cervical contact, due to length, necessitating restraint on the part of the man or both partners. 2. May result in painful intercourse, pain after intercourse, or bleeding in one or both partners due to girth. 3. May result in decreased frequency of sex due to discomfort during or after sex. 4. May make vaginal penetration impossible in cases of extreme girth. 5. May make fellatio and/or anal sex uncomfortable or impossible.