Any SSRI or SNRI medication has the potential to cause these sexual side effects. Everyone responds differently and sometimes it takes trial and error of different meds and at different dosages. I had practically given up on SSRIs due to experiencing a complete inability to ejaculate. Then my doctor put me on Lexapro but instead of the usual starting dose of 10 mg, he tried me on 2.5 mgs. At this dosage, the drug has actually been effective at reducing anxiety and depressive symptoms, yet at the same time I have not experienced the same degree of sexual side effects, still some, but nowhere near as bad.
On the subject of Wellbutrin. This drug does not reduce libido or orgasmic ability in any way, if anything it can have the opposite effect. But beware, Wellbrutrin is strictly an anti-depressant. It is a very "activating" anti-depressant and for some people it can cause insomnia, agitation, irritability, and and anxiety. I tried it several years ago. It gave me the libido of a 16 y/o but also the rage of a 16 y/o. I had to stop taking it when I was in a state of constant irritabilty and anxiety from it.