Being gay is perfectly natural, I agree...but also homosexuality and procreating poses an obvious catch-22. Unless a gay man is happy to sleep with a woman. When gay men say they have the 'right' to be parents you have to remind them that, while yes they might - to an extent - but they can only be parents if a woman is willing to give her baby away to them. Their 'right' is solely dependent on women agreeing to carry their sperm. Until men start growing wombs that is..
The surrogate is most often a womb to rent, she's impregnated with a fertilized egg (or two as in the couple I know), it's not her egg.
It is wonderful that there are women out there who want to give the gift of life to gay couples. I do think adoption should be promoted more though.