small penis

Help me please, Doctor Betty!

My new partner, whom I adore, struggles for his orgasm. I was married to a man with a larger cock (8inches, filled me, hurt sometimes) and my new man has a much smaller one. I feel guilty all the time and am frantically doing pelvic floor exercises! I frequently suggest anal sex, assuming he needs something a little 'tighter'. My gorgeous man is very sexually experienced and I am now expressing my sexuality and enjoying threesomes with him and he loves to watch me with other women, but now I can't relax and enjoy our threesome sex as I'm thinking...is she tighter than me? Does he enjoy her more than me? Can you give me some reassurance about my vagina and my ability to please my man? I've never had this problem before.