Yes. Male multiple orgasms are possible, they just take practice and skill. Actually, they can orgasm without ejaculating, then continue to orgasm. Search the other threads. Read the book The Multi-Orgasmic Man.
Oh, yeah. Some men can do it often (usually younger men) and some only occasionally, and some never.
My Man sometimes can still get it up and have an other orgasm, but at his age (he's in his 50s) it isn't often.
I dated a guy when I was much younger and the first time we had sex, he admitted afterward that he came as soon as he entered me, and "just kept going" and when on to have a second orgasm a while later. (he was 19, though...) I didn't even realize it. LOL!