You are naked with your partner for the first time ever. You are both soaking in the sights of one another's bodies. You see the female bend over and take notice of her asshole...the sphincter muscles appear stretched and wrinkly compared to other assholes you've seen. Do you assume the person must be into anal sex at that moment or attribute it to genetics? (My wife loves anal sex and the appearance of her asshole has changed over the last few years, i can also think of two well known pornstars off the top of my head whose mud puckers look well used and stretched in appearance and both of them are making a name for themselves doing anal on a regular basis.)
Same scenario...first time. You see her take her panties off...you take note that they are thong and look like something a female would wear to look and feel sexy. Her pubic hair is either shaved completely or trimmed into a sexy patch or strip. Her pussy is glistening. Her pussy lips look full and are very noticeable. Her confidence is strong when she is naked in front of you...her body language is very open and she is giving you hints of every aspect of her body...her tits, ass, pussy. Legs are always opened and freely revealing her pussy. She even is openly rubbing her clit with a couple fingers she had in her mouth. Do you assume from her confidence and the appearance of her swollen wet pussy and noticeable pussy lips that you're in for a good time for sure? (Again...my wife and i are swingers...we have alot of sex throughout the week. You can call her a slut if you think the label fits but she loves to fuck. Since we have started swinging and increased the amount of sex we have her confidence has increased and her pussy appears more opened and her pussy lips appear more full and hang more then they used to...not sure if the sex or increase in age has played a role though...but guys that get to fuck her are not disappointed.)
Same scenario...first time together sexually...the guy takes off his underwear and you take notice of a semi erect well proportioned cock that is anywhere from 7 1/2"-9" in length and 5 1/2"+ in circumference. Pubic hair is trimmed nicely. His confidence in front of you is strong. His cock has no problem getting fully erect and bulging at the sight of your naked body, a drop of pre-cum shines at the tip of his cock. Do you assume this guys been around the block and knows his way around a females body and with his confidence and impressive cock that you are more then likely in for a really good to great fuck. (My wife is into visual stimuli...she says that the guy can be hung and confident but not know how to "work it" but she will still have alot of fun because she will just mentally keep playing the image of his confident naked body standing in front of her while he is fucking her. Her favorite position for this is doggy because no eye contact is required and she can close her eyes and go through fantasies.
Judging a book by its cover even though their body may appear "well rode" but other factors such as genetics,age may play a role. Or has anyone said " yep, I'm gonna get some good ass tonight." Going off of appearances? I tend to judge...i have been right and I've also been wrong.