Postpartum sex is a major theme for any mom, especially when she's breastfeeding. Although you know that your breasts' actual purpose in life is to feed and nourish a baby, it's still hard to separate them from what they've been in your sex life. But, despite the weird things that happen when having sex as a breastfeeding mom, it's not impossible to enjoy sex again.
I'll give you one major point of advice — feed your baby before you have sex. I promise, that will alleviate a lot of your worries and inhibitions. It's really difficult to do anything when your breasts are engorged and swollen — especially sex. But it's also really hard to enjoy sex when your breasts are engorged and swollen, and your baby is crying to nurse. It's totally natural, yes. But it doesn't make postpartum sex any easier.
Because no matter how natural breastfeeding is and no matter how supportive your partner is (and should be), I don't blame you if you have a hard time enjoying nursing or enjoying sex as a breastfeeding mom. It's hard. With breastfeeding, it feels like your body no longer belongs to you. When you try to have sex, it's like your body is now a foreign object and the things that used to work in sex no longer make it happen. Especially when these three weird things happen during sex. But I promise, you will make it through and you will chalk it up to another "my body is a wonderland" moment. (You also might want to keep some towels and lube nearby.)