Never understood this mentality. I've had other guys tell me to do this too when I talk about my frustrations with meeting women. Yeah, I like to get off like any other guy, and bedding a woman is an awesome experience... when you're attracted to the woman.
I don't want to look at a naked woman and be grossed out by her body, or her face, zeroing in on all her imperfections or whatever. I've had some bad sex before, where I was just going through the motions and trying to get it over with as soon as decently possible.
Fucked a goth chick that frequently wore combat boots without socks. Had sex in my car once and her feet smelled bad. Fucked another girl that was big into laser hair removal - everywhere but between her legs. She completely let that shit go and, again, there was a smell involved. Hooked up with another girl that was big into body modifications. Her body was so wore out with piercings, ugly tats, and a casual druggie lifestyle I just couldn't get turned on by her. One time a girl started leaking out of her ass during sex.
Honestly if a girl doesn't flip some of my attraction switches (and no, just having a pussy isn't enough) I don't want to have anything to do with her. I'm horny, and very under-sexed, but I'm not so desperate to sleep with a fattie or an ug just for the sake of blowing my load.