my GF of 4 months today mentioned that every now and then when she's ***** she has been known to get off with some of her female friends, if she were to do this while she is going out with me i consider her to have cheated on me, i dont just mean a quick peck on the lips, i mean a full on snog, the problem is my GF couldnt understand why i thought it was so bad, she kept trying to argue that its not the same if its with the same sex, am i the only guy who has a problem with my GF kissing anyone but me 
