My boyfriend and I usually use condoms but sometimes we don't since I'm also on birth control. After we had sex without a condom his penis looked different. There was a slight coating on the head and there was a bright red bump on the under side. It's happened a few times before but not recently since we've been using condoms more. He says I'm the only girl he's experienced this with. Any ideas of what it could be? I'm worried there's something wrong with me 😓