Is this a problem?

OK........i have been thinking about this for a VERY VERY long time and I was wondering......if you can get some kind of disease from having butt sex???????? and the only reason why I ask is because my friend had butt sex after the guy got done with this other girl...............and I need to know if the guy(cause he didnt wash his area before have butt sex with her) and my friend could get something very bad......IF SO TELL ME SOOOOOOOOOOON!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

It is very very likely that they could have a disease so get them to the doctor to check it out maybe if its really important

ummm well if the guy or the girl had a sex disease then yes but if they did't then your friend is ok if I was you I would check it with the doctor and I know its a bit weird telling a doctor this but your friend could be in big trouble if she doesn't. I hope this helps bye! and if you also don't know if they have a diesesa ask them if they have it.