sex & getting wet problems

after becoming more familiar with sex and it happening more frequently i cant get wet as easy as i used to. usually when i have it there isn’t much foreplay because the man just wants to get to the point. we aren’t dating, just hookups and i don’t want to tell him i need more foreplay. how can i get wetter before sex or during? even during it’s been kind of hard for me to get wet and idk why. i’m comfortable & extremely attracted with this guy.