The erect cock is a beautiful organ, especially those that are quite big and thick and with helmet-shaped head. I think many women like the feel of it in their mouth - a warm hard live cock. A six or seven inch cock (15 to 17cm) would be just nice. You can put the whole shaft in your mouth and then slowly draws out, feeling the whole length of it.
Here are 2 sets of pictures ahowing women sucking cocks. I like the ways they do it. I think they enjoy it too.