Well, I am a virgin, so going another year without sex wouldn't exactly be hard (though really? No penis? That's just weird and would probably bring more trouble (how do I pee?) than it is worth). If it was more like the music example, where you have a magic repellant of sex so that I if I seek it out I get rejected or caught by the cops or hit with a fish or something, and no-one wants to have sex with me, consentually or otherwise, then I'd keep music for the year, though if I lost my penis for a year ... yeah, why not, it'd at least be interesting, and it isn't like I go showing people my penis anyway.
As for the 'forever' thing. I'd probably pick 'no music'. I could find enjoyment in other forms of entertainment, but not being able to have sex of any kind would probably limit my potential for any romantic relationships that may occur later down the track (chronogically). I mean, I don't have an interest in sex (I'm still young, so that will probably change as I get older) but just because I don't have a compulsion to have it doesn't mean it wouldn't serve an important and productive function in the promotion of a relationship (either romantic, for obvious reasons, or same-sex platonic, for the purpose of being able to properly communicate and interact in regards to a rather centralised aspect of social groups).