i've been married for some years now and am a (relatively) experienced man. i have anal sex regularly with my wife, as we both enjoy it and are able to orgasm together. most of the time we fall asleep in eachother's arms after lovemaking. this means my cum stays inside her ass at least overnight (some might drip off, but the thick of the juice stays there till the morning, when she dumps it). now, how healthy is this? she worries sometimes, but we have never done much to understand if there are any consequences. anyone with knowwledge on the subject?
I wouldn't worry about it. Semen is a hell of a lot cleaner than shit. For a healthy guy, semen and piss are the two cleanest things that ever come out of your body. They have less bacteria than saliva.