That comes in the forms of sex, partying , drugs , etc.

I don't want to make her unhappy, but females are the weaker sex, and logic seems to escape her.

We perform full credit and background checks as well as checking sex offender lists.

Lets say you're living in a house for two years and some horrible neighbor moves in (from sloppy, to registered sex offender or any other type of bad neighbor you might detest) or they build a race track near your house or any other crazy unforeseeable thing - you would now have to prepare to bend over unless you want to deal with living live there another three years.The third place I sold closed on 7/31/17.  

I like the female sex far too much to want to limit myself to just one.

And a looser criminal criteria if you choose to (level 1 sex offender or domestic violence, for example).  

You can also access the sex offender registry for free.

I don't mind renting to roommates,  I don't care if they are related or not, married or not, friends, same sex couples, different sex couples, non-binary couples...but if they don't even know each other, then suddenly thrown together under the same roof will present challenges, and some of those challenges take up my time.   

Evictions and sex offenders are the only non-negotiable for me.

Photographs in outfits that could be construed as provocative (i.e. trying to capitalize on the idea that “sex sells”) can attract more trouble than actual clients.