Whether they'll admit it or not, when men release their sperm deep inside a female they have this mental image created that they're impregnating the female as their sperm is released. Nothing to be embarrassed about, as it's simply a "deep seeded" (seems appropriate to say that) primal desire of the male, regardless of which species it is. Most of us guys (myself included) really despise condoms, however, as do many women. That's why I always encourage everyone to KNOW who they're fucking. This "free for all bareback" sex talk really concerns me because I know there are those with the brain of a fruitfly believing everything they read & see on the internet.
Maybe people ought to post a "disclaimer notice" when making those kinds of comments.