(pr-inside.com) - R& B star Rihanna surrounds herself with male friends because she believes men are more loyal than women.The single Umbrella singer, who has two brothers, enjoys talking through her dating problems with men.She says, "I have three girlfriends and about 20 guy friends."I love listening to guy talk because I learn a lot. Here's the key - you can't lower your standards for a guy because he won't respect you and he'll tell his friends. You always have to stick up for yourself and speak your mind."