Well, when you find that person, it's hard for your sex drive to just fall right after sex..
I mean, when I meet a woman/girl my first instinct is to want to take care of them.. not in a protective kind of way, more like an affectionate kind of way.. for the moment, it's killing me that I have nobody to go with during christmas & new years.. it's not really a sexual fantasy of mine.. but there's nothing I love more than walking in the city during the winter time with all the snow and lights, and seeing the tree all lid up, and people ice-skating, and it being cold outside.. and just having that person next to you while you both walk around for hours.. just walking, then eating dinner at some place.. then go sit down somewhere for hot chocolate.. then walk again.. then go home.. warm up.. ETC..
but when you find someone that you can do that with.. (which isn't EVERYONE.. actually, it's not even most people, it's a bit rare, uncommon is the best word to describe it).. then those feelings that you get from those bonding/romantic activities will give you the urge to express your love for that other person.. you'll want to please the other person.. and that's really where sex comes in..
so once sex starts.. especially for me in the winter-time.. oh man.. it's not stopping until work starts again.. I do all my shopping ahead of time.. and leave those two weeks that capture christmas and new years open and free-ed up.. because when i'm with someone.. we'll go at it.. and if I happen to climax.. i'll go put some cold water on my thing to go cool it down a little.. and then get right back at it.. probably from 8am - 1am with no more than about an hour total in breaks in between.. those were good times..