I enjoy that smell too. And I know exactly what you mean.
I used to go with guys when I was younger, but when I later realised I was gay and began sleeping with women, one of the most vivid things I noticed - strange to mention, perhaps - is that lesbian sex smells different.
I suppose it's because we, women that is, give off stronger scents during sex, so when there are *two* of us...
In my own experience, each of my lovers has had her own distinctive, personal aroma, but after love-making there's always a very powerful one, which floods my nostrils - a deep, dark, beautiful smell, of our vaginas, our wetness, our orgasms, and our sweat.
I love for my whole body to smell of my girlfriend's pussy after sex - not just my fingers, but my arms, my face, and my breasts.
