Yes, that's happened to me @Mountaindewed. As a single, sexual man, sometimes I might be starting to 'entertain myself' so to speak, but then suddenly think, "bleh, this is boring" and then just stop and do something else. Is this what you mean?

But as the previous two posters have pointed out, there are factors that contribute towards this.

I'm not sure how your testosterone treatment will effect you, but you might start seeing an increase in sexy thoughts. Obviously you'd know more about that than me, though.