I am incredibly comfortable with cumming inside of my girlfriend with no condom. We used the pill for about...8 months....But that is a hassle. She forgets to take her pill...We can't have sex for two days...So, when we went to college this past fall, she went to the health center and there is a new form of birth control called nuva ring (spelling perhaps). It is inserted in the woman's vagina, about 3-5inches inside. It stays inserted until a day before her period. It is better than the pill because it releases the proper hormones on a daily basis without forgetting to. So there is no "oh I forgot to take my pill, we can't have sex". Sure I feel it when i'm inside of her, but it gives a bit of pleasure. Causes a different sort of stimulation....I've never once been worried about getting her pregnant.

The question you asked can lead to a lengthy discussion.

1) if a man has been with his partner for awhile, and is in a committed relationship with her, chances are he will be comfortable with just the pill, or taking the chance of using nothing at all.

2) many men view birth control as the woman's responsibility, and therefore really don't think past the moment of having sex, and the possible consequences.

3) although effective if used correctly, any form of birth control is not 100% guaranteed. There are many factors that can alter its effectiveness. For example, if a woman is on the pill and has to take antibiotics for an infection, the antibiotics could interfere with the birth control causing the woman to get pregnant. I know of several women who have had this happen.