My girlfriend and i have been having sex for a while and we've been together for 2 years and we've never really had a problem. But when we first started dating and i would either have intercourse/or even oral with her she would be able to orgasm several times within that night. But lately it seems even if i make her orgasm small (just clitoris stimulation) she can't handle me even touching her breasts afterwords or she shakes. not anything crazy like a seizure, but non the less making it hard to pleasure her again. I know she isn't faking it when she has an orgasm (were very open with each other and theres plenty of mess left behind from her)so how can i make it so she can have multiple orgasms and we can last more than an hour?