I would be careful on the lavender. It smells great and I use it on my shirts in small quantities but it may be a testosterone blocker. There are conflicting studies on this but why bother taking the chance since you really don’t have to? Just as a note, I use it on my shirts because chicks love it when it is a background smell as it is very relaxing. Somewhat way over simplified but it is a powerful scent.
I haven’t heard of this trait of lavender. Frankincense and Myrrh has the biggest influence on testosterone and oestrogen basically producing “fake” hormones. Anyway, most essential oils seems to rather have a balancing effect on hormones rather than stimulating the one or the other. If you are worried about lavender then go for Patchouli. It’s basically the male version of lavender.
Further, I have to say that even though I do use lavender it is certainly not my favourite. It’s just not how a dick should smell.