All of the above... and genuine hunger. Not that I do a lot of hobbying (my geography and schedule are not hobby-friendly), but there are women who deliver a transaction, and there are women who deliver passion and an experience. It's easy to tell, for example, when a woman 'permits' kissing, and it's equally easy to tell when a woman craves it. A partner who treats my lips and mouth like they're her last meal, who sucks on my tongue like she's giving it a bj, who demands I suck on her tongue and whimpers when I come up for air, a woman who can't get enough DATY and mumbles "OMG I can't decide whether I want your mouth or your cock" is worth her weight in gold. For me, her pleasure is my pleasure.
Even if it's just IOP <g>.