You can read this one of two ways (perhaps four maybe mmmmmmmmm),
1. 5% of heterosexual men and homosexual women can't bring their partners to orgasm because they're not great lovers,
2. 95% of heterosexual men and homosexual women can bring their partners to orgasm because they're either giving or good lovers,
(3. 5% of heterosexual men and homosexual women don't bring their partners to orgasm because they're selfish or bad lovers,
4. 95% of women own sex toys and masturbate (I know all my girlfriends have had) (I said perhaps four maybe))