 My girlfriend is 5 years older and her body is thicker than mine and when we have sex, I feel nothing around my penis because her vagina becomes even bigger when she's fully on. Will I become ill if I have sex with her? Okay, let me put it this way. If you were overweight or if you were older than the woman or even if your penis was differently sized, do you think that if a woman had sex with you, she would become ill? No, right? I mean, I don't even think that that thought would ever cross your mind, correct? In the same way, there is no reason to think that you would become ill if the woman is either older or larger than you. Two, all sexual organs become enlarged during arousal just as the penis becomes larger, so does the vagina, it's not a disease, it's just how nature works. Three, if the problem is that your sexual organs are the wrong size for each other, the Kamasutra says that you can get past this issue very easily by trying different positions because your size can be somewhat adjusted by using different positions. Google this, there's lots of information out there. And finally and most importantly, if you want to end the relationship, just have the courage to end it. Don't put the burden of this on your partner by saying that it's either their body shape or their age or their size, don't blame them for this bit because those are scars that don't heal and frankly it's a nasty thing to do to anyone.