Anal Sex Question?

Im a bisexual male and I recently had anal sex with a guy I met from a club. When we engaged in anal sex we DID use condoms, and we used lots of lube. We've only had sex 2 times together and each time when we at done I have to go to the bathroom to take a poop, and while I'm taking a poo it seems like its always dirrhea, and before any poop comes out this clear white slimy looking fluid comes out that looks a lot like cum, but I'm thinking it's not cum because everytime we finish I ask him if the condom is okay and he says yes. What else could this clear, white, stuff be coming out, it also comes out like water.