Is a quicky enough to satisfy husbands' sexual needs? Will the wife end up feeling unsatisfied or used? if so, does husband feel guilty about not being able to satisfy their wive's sexual needs and desires?

Personally, I think quickies are very convenient when you're not really in the mood but your husband still wants to get intimate. If the sexual need is mutual then by all means, take the time for both to be satisfied. But if we are being realistic, there will be days that a quickie will be come in useful.