This is an awkward topic for me to discuss but I have noticed that sometimes my husband's penis feels like it is longer than at other times. Our go to position is from behind and I have noticed that sometimes his penis is longer or reaches more deep inside. Is this normal? Does this have to do with my anatomy or is he not fully erect sometimes? This is mortifying to think he really isn't into me. We've been together since we were teens and married for 10 years. I just want to know what I can do differently or if it's out of my control. Is it normal or is it me?