Great news moonbeam - hope it works!
I apply it in the morning. I would wait for a while before swimming - not sure how long. Maybe you could apply in the evening - after all any transfer to partner would not be a worry if partner is male? You would need to wait for it to dry though.
I was told to apply to alternate inner thigh but you do get hair growth - well I do anyway. I try to rotate the place up and down the thigh. Sometimes on the tummy instead. Not too close to the vag area though....
How much do you have to use? Presumably you've been given testogel or testim which are the same strength?
Good luck and don't expect it to work overnight! I was told 4-5 months by Annie Evans ( slow and steady changes)!!! Enjoy your hols
Hurdity x