Grace is correct.
From a logical, scientific, even "common sense" standpoint, if playing with oneself had any meaningful correlation with raised or lowered T levels - to the extent that it could even come close to counteracting the effects of spiro - then why would we need spiro at all?
Teenage boys would have T levels close to zero (if T was reduced by the act), or they'd all be 'roid-raging muscle beasts (if T was increased). And what about girls?
The fact is that it has no meaningful effect. Do it five times a day or once a month, doesn't matter. Abstain or indulge as you prefer.
I think the confusion is arising because of a common misapplication of a basic rule of logic. High T levels
cause sexual desire (and the need to touch oneself inappropriately), but this doesn't mean masturbation raises T levels; high T levels are not
caused by masturbation. Similarly, low levels of T
causes a lack of sexual urges (and low or no self abuse), but one cannot reverse the statement and claim that low T is
caused by abstinence.
A causing B does
not mean that B also causes A.
Don't obsess over this one, girls. If you like doing it, then do it. If you don't, then don't. If you think your T or medication levels are wrong, see your endo.