Dry sex.

I notice that every time me & my bf have sex I get dry. Normally we start off I’m on top of he’s on top of me & I finish. Then he wants it doggy style & I find myself stressing once I know he wants it that way because I always seem to get dry. It’s so crazy but I used to love it doggy style now I don’t lately it’s been causing an issue because he says I’m not attracted to him, & I am. Any suggestions?