Using protection may not be as nice for men, but it may be very 
much better for women.  By dampening your pleasure, it will help 
you last longer, which makes it more likely that your partner 
will have an orgasm.

Also, if you don't like condoms, and AIDS or other STDs are not 
a real issue (for example, you are in a long-term monogamous 
relationship), there are other methods of birth control that are
better than the rhythm method (which is not very effective).
You can use the sponge, a diaphragm, the pill or mini-pill or
other hormonal contraceptives.