I have a huge issue with Last Minute Resistance and need help

The last 5 dates I've been on, I've pulled the girls to my place and they always insist on leaving shortly after I start making out with them. I don't know what I'm doing wrong. I flirt with them on the date, my profile is set up to be sexual, The girl and I make it clear to each other that we're not looking for something serious, I give them time (5-10 minutes) at my place before we start making out. They seem very nervous and stiff during the makeout, even though they always go to my bathroom to "freshen up" when we get to my place, like they're expecting kissing/sex.