( The Frisky ) -- I once told my mother about a girl I had a crush on . At the time , I think I was about 16 , and I had so much acne that if I fell asleep at a library , when I woke up , a blind guy would be trying to read my face . `` Just go for her , '' my mother said . `` It 's not that simple , '' I said , while filling out my order form for 25 crates of Noxzema . `` She 's got a boyfriend . '' `` Well , do n't do anything differently . Act like she does n't . That 's how I got your father . '' She then walked out of the room , leaving my pasty teenage complexion an extra shade of white as I actually contemplated my mother dating . I 've since related this story as an example of how hitting on someone with a significant other is n't always a terrible thing . Hey , if they 're not married or serious , go for it . However , if you 're considering trying to get a guy who has a girlfriend , there are a few things you should know . The Frisky : The Top 5 online dating do 's and don'ts for guys . First , I 'll admit guys will hit on anything . I once observed one of my friends hitting on a street sign . Granted , he was drunk , but it did not matter to him that he was hitting on an inanimate object , or that the street sign was a little out of his league . Men do have standards , but when they 're single , they 'll hit on a woman with a boyfriend . They 'll hit on nuns . Very occasionally , they 'll hit on nuns with boyfriends . I 'm not going to defame my own kind , but women can be better at subtlety , and you should use this to your advantage . The Frisky : Is cheating worse when you 're married ? I 'm a big anti-cheating guy , so if a woman hit on me while I had a girlfriend , I 'd be flattered . If she offered to go home with me or tried to kiss me or something like that , milk would shoot out of my nose and I 'd run for the hills . ( I have an odd fight-or-flight mechanism . ) Subtlety is your friend . We 'll pick up on the signals . If a guy is interested , wait for him to honorably break up with his girlfriend before the two of you start dating . Frankly , this is just good manners . The Frisky : To tell or not to tell on a cheater ? It should go without saying that it 's bad form to hit on a guy while his girlfriend is actually there , or even if she 's in the same town . Men have a well-honed sense of panic that kicks in when someone 's hitting on them while their girlfriends are in the same ZIP code . We know that women can read us , so unless you 're hitting on a really shady guy , you 'll scare him off as he runs home to call his girl and tell the story of the Evil Homewrecking Woman . The Frisky : Can couples get past infidelity ? One last thing : If you do snag a guy away from his girlfriend , be wary . The good news is that , despite the popular perception , most of us men tend to be loyal once we 're in a committed relationship . But know that if it happened once , it can happen again . TM & © 2009 TMV , Inc. | All Rights Reserved .
Writer : Some guys will hit on anything -- even inanimate objects . Writer : Hitting on a guy when his girlfriend is nearby will make you ` ` Evil Old Woman '' If you push him away from someone , be wary : It could happen again , he says .