Not true at all, I have two females who are very affectionate. They give kisses, are really tolerant of the kids, sleep on our laps, etc. Actually, all four pigs I've ever had were female and all four were very sweet and affectionate! It does take time for guinea pigs to get accustomed to handling by people, both male and female. It is their instinct to run, they are prey animals and that kind of reaction is in their makeup. A lot of pigs who are perfectly happy being held still don't like being picked up. One of my pigs (Sundae, the lighter one on the right in my avatar picture) was extremely nervous and skittish when we got her. She is now the world's biggest mooch and very affectionate, so hang in there, it just takes time!