Originally posted by
I use condoms but I don't use them while trying anal with my partner. We're both mono and been checked out.
Even after being check and monogamous it is still recommended to use condoms for anal as there is fecal matter and bacteria in the anal cavity. Plus the condom makes it easier from what I have heard. Not to mention if you want to go from anal to vaginal without having to shower you can pull condom off an enter vaginally. Assuming that would be the case as you don't want to go from anal to vaginal as that can cause infections.
As for the question all it takes it one sperm to get in the vagina so yes if you leak semen out an it leaks down to your vagina it could just so happen you end up pregnant but not likely