Zannah used it more as a tool than for pleasure. When she needed intelligence she used her looks to her advantage. All Bane cared about was power, but with Githany it was different [although he didn't much cry over her getting killed].
Sexuality in Star Wars is a bit confusing . . . but answering the question of Ben and Vestara, the answer is no. They were both horny teenagers, but Jaina scared Vestara too much. Damn Sword of the Jedi prevented Ben from getting laid.
Originally posted by Darth Abonis
I don't think the Force and sex are connected in any way whatsoever.
I'm sorry but that's pretty dumb. The Force is strongly influenced by emotions and feelings. Making love invokes very powerful feelings.
Anyway, to answer the OP's question, I'd expect being able to sense a partner's feelings would add to the experience of making love tremendously. If both partner's are Force-sensitive then being able to feel each other's love and joy would further strengthen their bond. Heck, I expect it would be the same even if only one partner is Force-sensitive.