When we first were having sex my girlfriend was cumming 3-5 times average. Well within the past month it’s only been 1 or 2 times. And I did some research and usually the only stuff that affects it age , pregnancy. But we’re young and she’s not pregnant. . I still give the same or more effort, more foreplay, more positions. Im doing everything the same or better . Still her pleasure is going down . Is she cheating with someone who does it better ? Is there a better opinion?? I need help with this , it’s greatly messing with my mental state . I ask her why and she doesn’t have a clear answer. She says she’s loyal and that she doesn’t really touch her self