At present I don't think this question can be answered. The science of chemo-signalling in humans is at its infancy, and a number of substances secreted by humans have been found that have an effect on others. For instance the odorous steroid compound 4,16-androstadien-3-one (androstadienone), found in axillary sweat causes a hypothalamic response in both men and women.
When exposed to the "high" androstadienone concentration, women showed
stronger hypothalamic activation than men. By contrast, men showed
more hypothalamic activation when exposed to the "medium"
androstadienone concentrations in comparison to women.
Tears also appear to contain a chemosignal, which not unexpectedly are a turn off for both sexes: 
We found that merely sniffing negative-emotion-related odorless tears
obtained from women donors induced reductions in sexual appeal
attributed by men to pictures of women's faces. Moreover, after
sniffing such tears, men experienced reduced self-rated sexual
arousal, reduced physiological measures of arousal, and reduced levels
of testosterone. Finally, functional magnetic resonance imaging
revealed that sniffing women's tears selectively reduced activity in
brain substrates of sexual arousal in men.
There appears to be some gender differences in responses, so this one to fear was only found in females: 
Facial electromyography was used in a double-blind experiment to
measure in the receiver a partial reproduction of the state of the
sender, controlling for the moderating influence of the sex of the
sender and receiver. The results indicated that only female
participants emulated the fearful state of the sender. The present
study revealed a boundary condition for effective chemosignaling by
reporting behavioral evidence of sexual asymmetry in olfactory
communication via chemosignals.
Disgust can also be transmitted by chemosignals 
disgust chemosignals evoked a disgusted facial expression and sensory
rejection (decreased sniff magnitude, target-detection sensitivity,
and eye scanning). These findings underline the neglected social
relevance of chemosignals in regulating communicative correspondence
outside of conscious access.
However, the signal for sexual attraction/excitation has not yet been identified, or should we say published.
 Burke SM, Veltman DJ, Gerber J, [..], Bakker J. Heterosexual men and women both show a hypothalamic response to the chemo-signal androstadienone. PLoS ONE. 2012 Jul 16;7(7):e40993. doi: 10.1371/journal.pone.0040993. PubMed PMID: 22815889.
 Gelstein S, Yeshurun Y, Rozenkrantz L, [..], Sobel N. Human tears contain a chemosignal. Science. 2011 Jan 14;331(6014):226-30. doi: 10.1126/science.1198331. PubMed PMID: 21212322.
 de Groot JH, Semin GR, Smeets MA. Chemical Communication of Fear: A Case of Male-Female Asymmetry. J Exp Psychol Gen. 2014 Mar 3. doi: 10.1037/a0035950. PubMed PMID: 24588218.
 de Groot JH, Smeets MA, Kaldewaij A, [..], Semin GR. Chemosignals communicate human emotions. Psychol Sci. 2012 Sep 27;23(11):1417-24. doi: 10.1177/0956797612445317. PubMed PMID: 23019141.